CENTENNIAL, Colo. -- A single-engine plane that entered a temporary no-fly zone in the Denver area has landed without incident after the military scrambled two F-16s to intercept it.

The plane was intercepted after President Barack Obama spoke in Golden, Colo., around 11 a.m. Thursday but before he flew out of Buckley Air Force Base in Aurora a few hours later.

North American Aerospace Defense Command, or NORAD, says the plane was out of radio communications around 12:30 p.m., when Arapahoe County Sheriff Grayson Robinson says the plane flew near Buckley.

Robinson says the F-16s escorted the plane to Centennial Airport south of Denver, where authorities determined the pilot made an honest mistake. Robinson says the pilot regularly flies from Wyoming to Colorado and somehow missed the notice on restricted air space.

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    President Barack Obama speaks during a campaign event at Lions Park, Thursday, Sept. 13, 2012, in Golden, Colo. (AP Photo/Carolyn Kaster)

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    President Barack Obama waves while boarding Air Force One at Buckley Air Force Base, in Aurora, Colo., Thursday, Sept. 13, 2012. (AP Photo/David Zalubowski)

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    Backwash from Air Force One blasts members of the U.S. Secret Service as the plane turns to head down a runway with President Barack Obama on board at Buckley Air Force Base in Aurora, Colo., Thursday, Sept. 13, 2012. (AP Photo/David Zalubowski)

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    President Barack Obama boards Air Force One at Buckley Air Force Base, Thursday, Sept. 13, 2012, in Aurora, Colo., en route to Washington. (AP Photo/Carolyn Kaster)

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    President Barack Obama greets supporters after speaking at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

  • Barack Obama

    President Barack Obama speaks at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

  • Barack Obama

    President Barack Obama greets supporters at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

  • Barack Obama

    President Barack Obama speaks at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

  • Barack Obama

    President Barack Obama speaks at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

  • Barack Obama

    President Barack Obama waves after speaking at a campaign rally in Golden, Colo., Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

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    President Barack Obama exchanges a high-five with a youngster after speaking at a campaign rally in Golden, Colo., on Thursday, Sept. 13, 2012. (AP Photo/Ed Andrieski)

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    President Barack Obama shakes hands with U.S. Air Force member Ricky D. Watson of Littleton, Colo., during a campaign event at Lions Park, Thursday, Sept. 13, 2012, in Golden, Colo. (AP Photo/Carolyn Kaster)

  • Barack Obama

    President Barack Obama speaks during a campaign event at Lions Park, Thursday, Sept. 13, 2012, in Golden, Colo. (AP Photo/Carolyn Kaster)

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    President Barack Obama returns a baby after holding it during a campaign event at Lions Park, Thursday, Sept. 13, 2012, in Golden, Colo. (AP Photo/Carolyn Kaster)