TEHRAN, Iran -- TEHRAN, Iran (AP) — Iran's top leader hinted Saturday that he disapproved of the phone call between Presidents Hassan Rouhani and Barack Obama during the Iranian leader's trip to New York last month, but he reiterated his crucial support for the president's policy of outreach to the West.

Ayatollah Ali Khamenei's comments came after hard-liners criticized the 15-minute phone conversation between Rouhani and Obama, a gesture aimed at ending three decades of estrangement between the two countries.

Hard-liners, including commanders in the powerful Revolutionary Guard, have said the president went too far in reaching out to the U.S.

Khamenei, whose speech was broadcast on state TV, also said the U.S. was "untrustworthy." He previously has said he's not opposed to direct talks with the U.S. to resolve Iran's nuclear standoff with the West but is not optimistic.

"We support the government's diplomatic moves including the New York trip because we have faith (in them)," Khamenei told commanders and graduating military cadets in Tehran. "But some of what happened in the New York trip was not appropriate," a thinly veiled reference to the phone call.

Iran is at loggerheads with the U.S. over its disputed nuclear program, which the West says aims at developing weapons technology. Iran says its program is for peaceful purposes and geared toward generating electricity and producing radioisotopes to treat cancer patients.

"We are skeptical of Americans and have no trust in them at all. The American government is untrustworthy, arrogant, illogical and a promise-breaker. It's a government captured by the international Zionism network," Khamenei said.

Rouhani said before and after his trip to New York that he had "full powers" to negotiate a deal with the West, an indication that he had received a mandate from the supreme leader, who has final say on all matters of state. His outreach has also received broad support from Iranian legislators and it appears popular, but some including the Guard seem rattled by the pace of developments.

The Guard's chief commander, Gen. Mohammad Ali Jafari, praised Rouhani recently but called the phone call a "tactical mistake" and said he should have avoided it.

"The respected president, who adopted a powerful and appropriate position in the trip ... would have been better off avoiding the telephone conversation with Obama - in the same way he didn't give time for a meeting with Obama - and left such measures until after practical, verifiable steps by the U.S. government and a test of their good will," he said in an interview earlier this week.

The Guard is one of the few institutions capable of acting as a spoiler if it sees Rouhani going too far and too fast.

Khamenei's remarks may have been prompted by recent statements from Washington that Tehran feels run counter to the spirit of reconciliation.

For example, Obama said Monday, as he met with Israeli Prime Minister Benjamin Netanyahu, that the U.S. was not taking a military option against Iran's nuclear program off the table.

Earlier on HuffPost:

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  • Iranians celebrate the victory of moderate presidential candidate Hassan Rouhani (portrait) in the presidential elections at Vanak square in northern Tehran on June 15, 2013. Iranian Interior Minister Mohammad Mostafa Najjar said Rouhani won outright with 18.6 million votes, or 50.68 percent. (ATTA KENARE/AFP/Getty Images)

  • Passengers in a public bus flash victory signs in a reaction of supporters of the Iranian presidential candidate Hassan Rouhani, as they attend a celebration gathering, in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • A supporter of Iranian presidential candidate Hassan Rouhani, shown in poster, attends a celebration gathering in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • Supporters of the Iranian presidential candidate Hassan Rouhani, shown in poster at center, attend a celebration gathering in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • A female supporter of Iranian presidential candidate Hassan Rouhani flashes a victory sign as she holds his poster during a celebration gathering in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • Supporter of the Iranian presidential candidate Hassan Rouhani celebrate outside his campaign headquarters in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • A female supporter of Iranian presidential candidate Hassan Rouhani, flashes a victory sign as she holds his poster during a celebration gathering in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • A supporter of Iranian presidential candidate Hassan Rouhani holds his poster as another youth waves to a clergyman outside the campaign headquarters of Rouhani, in Tehran, a day after the election, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • An Iranian woman flashes the sign for victory as she holds a portrait of moderate presidential candidate Hassan Rouhani during celebrations for his victory in the Islamic Republic's presidential elections in downtown Tehran on June 15, 2013. (BEHROUZ MEHRI/AFP/Getty Images)

  • Iranians supporters of moderate presidential candidate, Hassan Rouhani flash the sign of victory holding a portrait of him as they wait for the final results outside his campaign headquarter in downtown Tehran on June 15, 2013. Rouhani has a clear lead in Iran's presidential election, garnering 51 percent of the vote at 65 percent of polling stations across the country, the interior ministry said. (BEHROUZ MEHRI/AFP/Getty Images)

  • An Iranian woman holds a portrait of moderate presidential candidate Hassan Rouhani as she rides on a motorcycle along Valiasr street in Tehran on June 15, 2013 after he was elected as president. (BEHROUZ MEHRI/AFP/Getty Images)

  • An Iranian woman holds her purple scarf, the campaign color of moderate presidential candidate Hassan Rouhani, as she celebrates along Valiasr street after he was elected as president on June 15, 2013, in the capital Tehran. (BEHROUZ MEHRI/AFP/Getty Images)

  • Iranians gather as they celebrate the victory of moderate presidential candidate Hassan Rouhaniin the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. Iranian Interior Minister Mohammad Mostafa Najjar said Rouhani won outright with 18.6 million votes, or 50.68 percent. (ATTA KENARE/AFP/Getty Images)

  • Iranian supporters of moderate presidential candidate Hassan Rouhani who won the national elections, celebrate in downtown Tehran on June 15, 2013. (BEHROUZ MEHRI/AFP/Getty Images)

  • Iranians celebrate along Valiasr street, in the capital Tehran, on June 15, 2013, after moderate presidential candidate Hassan Rouhani was elected as president. (BEHROUZ MEHRI/AFP/Getty Images)

  • An Iranian woman celebrates the victory of moderate presidential candidate Hassan Rouhani (portrait) in the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranians celebrate the victory of moderate presidential candidate Hassan Rouhani (portrait) in the Islamic Republic's presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranians celebrate the victory of moderate presidential candidate Hassan Rouhani (portrait) in the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranians gather to celebrate the victory of moderate presidential candidate Hassan Rouhani in the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • An Iranian woman celebrates the victory of moderate presidential candidate Hassan Rouhani in the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranians gather as they celebrate the victory of moderate presidential candidate Hassan Rouhani in the presidential elections at Vanak Square, in northern Tehran, on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranian women hold a portrait of moderate presidential candidate Hassan Rouhani who won the national election in downtown Tehran on June 15, 2013. (BEHROUZ MEHRI/AFP/Getty Images)

  • A female supporter of Iranian presidential candidate Hasan Rouhani flashes a victory sign, as she holds his poster, during a celebration gathering, in Tehran, Iran, Saturday, June 15, 2013. (AP Photo/Vahid Salemi)

  • Iranians celebrate the victory of moderate presidential candidate Hassan Rowhani (portrait) in the Islamic Republic's presidential elections in downtown Tehran on June 15, 2013. (BEHROUZ MEHRI/AFP/Getty Images)

  • In front of a portrait of the late Iranian revolutionary founder Ayatollah Khomeini, presidential candidate Hasan Rowhani, a former top nuclear negotiator, center, gestures to his supporters at a rally in Tehran, Iran, Saturday, June 1, 2013. (AP Photo/Ebrahim Noroozi, File)

  • An Iranian woman holds a portrait of moderate presidential candidate Hassan Rouhani as she rides on a motorcycle along Valiasr street in Tehran on June 15, 2013 after he was elected as president. (BEHROUZ MEHRI/AFP/Getty Images)

  • Iranians celebrate the victory of moderate presidential candidate Hassan Rouhani in the Islamic Republic's presidential elections at Vanak square in northern Tehran on June 15, 2013. (ATTA KENARE/AFP/Getty Images)

  • Iranians celebrate the victory of moderate presidential candidate Hassan Rowhani (portrait) in the Islamic Republic's presidential elections at Vanak square in northern Tehran on June 15, 2013. (ATTA KENARE/AFP/Getty Images)