The US officials, speaking on the condition of anonymity, says there were no indications so far that the plane had been brought down by enemy activity.
Male and female Afghan models participated in Kabul's first-ever street fashion show, promoting the country's culture along with a message for peace, a media report said.
US forces on Tuesday recovered two bodies near the wreckage of a military jet that crashed in a Taliban-controlled area of eastern Afghanistan, after Afghan forces trying to reach the scene clashed with insurgents.
The multi-pronged assault took place in Khwaja Alwan district of Baghlan province early Tuesday, said the provincial police spokesman Ahmad Jawed Basharat.
They were identified as Lt. Col. Paul K. Voss, 46, of Yigo, Guam, and Capt. Ryan S. Phaneuf, 30, of Hudson, New Hampshire. Voss was assigned to Air Combat Command headquarters at Joint Base Langley-Eustis in Virginia. Phaneuf was assigned to the 37th Bomb Squadron at Ellsworth Air Force Base in South Dakota.
"Some mortars were fired from across the border in Afghanistan and landed inside Pakistan. They caused some damage to vehicles," Mahmood Aslam Wazir, deputy district commissioner of the area on the Pakistani side, told Reuters.
Despite a winter lull in fighting due to heavy snowfall in the mountains where the Islamist Taliban typically rest and regroup ahead of their annual spring offensive, roadside bombs continue to hit Afghan forces and their foreign allies.
The attack apparently targeted a local militia commander who escaped unharmed, said Jawad Hajri, a spokesman for the governor of Takhar province, where the attack took place late Saturday.
The Taliban on Monday denied agreeing to any ceasefire in Afghanistan after rumours swirled of a potential deal that would see a reduction in fighting after more than 18 years of war.