KABUL, Afghanistan -- A civilian cargo plane crashed at Bagram Airfield on Monday, officials said.
Lt. Quenton Roehricht, of the International Security Assistance Force, said the plane developed some kind of problem "very shortly" after taking off and crashed at about 3 p.m. local time (6:30 a.m. ET).
"At this time, we can confirm there was no insurgent activity when contact was lost," he said.
The Taliban has issued a warning that it will increase attacks on foreign military forces in Afghanistan. NBC's Ron Mott reports.
Roehricht said information was still being gathered and he was not able to confirm whether there had been any casualties or what might have caused the crash.
Zamaray Khan, a local police chief, said there was a large fire after the plane crashed and it appeared that the crew members had been killed.
The Taliban claimed in a statement that it had shot down an American plane at 4 p.m. local time (7:30 a.m. ET).
It said the alleged downing of the plane was part of its spring offensive, which began Sunday and which the Taliban pledged would be "monumental.”
The Taliban is known for employing bombastic language in describing its achievements, and its claims are frequently invalidated or unproved.
At least three police officers were killed by a bomb in Ghazni province in the east of the country on Sunday.
NBC News' Ian Johnston contributed to this report.
This story was originally published on Mon Apr 29, 2013 9:21 AM EDT