Horrifying video footage has surfaced depicting the US Boeing 747-400 crash that occurred just after takeoff Monday at Bagram Airfield in Afghanistan, killing all seven civilian crew members aboard. Although the Taliban initially claimed responsibility for the accident, NATO told the Associated Press there was no sign of insurgent activity in the area.

The dashcam footage that appeared on LiveLeak early Tuesday provides some insight as to what happened to the civilian cargo plane owned by National Airlines, an Orlando, Fla.-based subsidiary of National Air Cargo.

The video shows the plane, which was carrying five military vehicles and other cargo from the airfield just north of Kabul to Dubai, ascending at a particularly steep angle in rather inclement weather conditions. Suddenly, the plane veers off course before plummeting to the ground and bursting into flames.

Based on the footage, aviation experts have offered a variety of possible explanations for the crash while the Afghanistan Ministry of Transportation and Commercial and Aviation and the National Transportation Safety Board investigate the incident. Aviation-Safety.net has suggested weather may have played a role.

“A thunderstorm with Cumulonimbus clouds was approaching the air base at the time of the accident,” the site reported. “A weather report shows winds began shifting from 100 degrees [from the east] at 09:55 UTC to 350 degrees [from the north] at 10:55 UTC. Accident time was about 15:00 LT / 10:30 UTC”

Meanwhile, United airlines captain Ross Aimer told Business Insider that while he hesitates to speculate on the cause, the plane may have stalled because it took off at too sharp an angle, causing it to “drop like a rock,” or cargo may have shifted during its ascent.

“The very high angle of the airplane… is a definite no-no. There’s no way they could control that. Once you get into that, it stalls,” Aimer said. “Something they were carrying might have been heavy and not tied down properly and shifted all the way to the back of the airplane.”

The victims included pilots Brad Hasler, Jeremy Lipka; mechanic Gary Stockdale; first officers Jamie Brokaw, Rinku Summan; and loadmaster Michael Sheets—all of Michigan—as well as maintenance crewman Timothy Garrett of Kentucky.