Baghdad's al-Sarafiya Bridge allegedly blown up by remote-controlled explosives, was in fact destroyed by a US warplane, a new report says.

A video taken on a cellphone indicates that a US F-16 dropped a 'five-hundred-pounder' on the bridge in April.

"We're dropping a five [...] hundred pound bomb on that [...] house over there. Yeah," says an unknown man on the recording with a clear American accent.

"We got a F-16, we got a [...] M1 Abrams over there," the man continues.

"Ten second impact! Get down and plug your ears," another unidentified man says.

As the video continues, the audio suggests that a jetfighter entering the area drops the bomb on the bridge.

The bridge, which connected two Shia and Sunni neighborhoods on the banks of the Tigris River, goes down after the impact; victory celebration follows.

As the bridge partially collapsed at least 10 people were killed and 26 were injured, leaving some 20 people trapped in their cars.

After the incident, the US military falsely claimed that the al-Qaeda had taken responsibility for the destruction of the bridge.