KABUL, Afghanistan — The NATO military coalition in Afghanistan has denied a United Nations report that a coalition airstrike killed three children in eastern Afghanistan.

The United Nations Children's Fund cited the alleged incident in a statement this week condemning a steep rise in child casualties. The statement said an aerial attack by international forces killed three children in the eastern province of Kunar this month.

The U.S.-led coalition said Friday that the report was "simply not true," and it had no aircraft operating in Kunar at the time of the June 6 incident. It said discussions with the provincial governor indicated that reports of a drone strike had been a misunderstanding.

UNICEF insisted Friday that it verifies all its figures and stands by the Kunar report.

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  • In this Wednesday, March 20, 2013 photo, Afghan villager Ghulam Rasool sits in the yard of his house where he and his family found refuge in the village of Khalis Family Village, Nangarhar province, Afghanistan. Rasool padlocked his front door, handed over the keys and his three cows to a neighbor and in the middle of the night left his mountain home to escape relentless air strikes. (AP Photo/Anja Niedringhaus)

  • In this Wednesday, March 20, 2013 photo, the grandchildren of Afghan villager Ghulam Rasool, in the yard of the house where he and his family found refuge in the village of Khalis Family Village, Nangarhar province, Afghanistan. Ahmed's grandfather Rasool padlocked his front door, handed over the keys and his three cows to a neighbor and in the middle of the night left his mountain home with is family to escape relentless air strikes. (AP Photo/Anja Niedringhaus)

  • In this Wednesday, March 20, 2013 photo, the grandson of Afghan villager Ghulam Rasool, 12 year old Ahmed Shah, center, recalled the attack on his village in the yard of his house where he and his family found refuge in the village of Khalis Family Village, Nangarhar province, Afghanistan. Ahmed's grandfather Rasool padlocked his front door, handed over the keys and his three cows to a neighbor and in the middle of the night left his mountain home with is family to escape relentless air strikes. (AP Photo/Anja Niedringhaus)

  • FILE - In this Sept. 4, 2009 file photo, a KZO surveillance drone takes off from the German base in Kunduz, Afghanistan. Criticism of drones has mounted in recent months. At the United Nations an inquiry has been launched into the civilian impact and human rights implications of using drones. The first in a series of reports is expected in May. In the United States, lawmakers are demanding greater transparency questioning the legality of using the unmanned predators to target and kill American citizens overseas as well as the implications of using smaller surveillance drones in the U.S. (AP Photo/Anja Niedringhaus, File)

  • In this Tuesday, March 19, 2013 photo, Afghan boys study in a makeshift school in the village of Budyali, Nangarhar province, Afghanistan. The village lost its former school building after Taliban militants attacked the district headquarters of Budyali in July 2011. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, an Afghan man sits among the debris of a destroyed school in the village of Budyali, Nangarhar province, Afghanistan. Taliban militants attacked the nearby district headquarters in July 2011, then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, Afghan men sit among the debris of their destroyed school in the village of Budyali, Nangarhar province, Afghanistan. Taliban militants attacked the nearby district headquarters in July 2011, then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, Hayat Gul, who was injured in a gun battle ahead of a 2011 air assault on the village school he guarded, tells his story in Budyali, Nangarhar province, Afghanistan. Taliban militants attacked the nearby district headquarters and then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, Afghan men peer through the former window of their destroyed school in the village of Budyali, Nangarhar province, Afghanistan. Taliban militants attacked the nearby district headquarters in July 2011, then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, Afghan men walk through the debris of their destroyed school in the village of Budyali, Nangarhar province, Afghanistan. Taliban militants attacked the nearby district headquarters in July 2011, then took refuge in the school. The Afghan National Army requested help from coalition forces, who responded with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)

  • In this Tuesday, March 19, 2013 photo, papers of schoolbooks lie among the debris of a destroyed school in the village of Budyali, Nangarhar province, Afghanistan. The Taliban attacked the district headquarters of Budyali in July 2011 and coalition forces responded to the Afghan National Army request for help with drones, fighter jets and rockets, leaving the school destroyed, according to village elders. (AP Photo/Anja Niedringhaus)