An American Marine is under investigation after being videotaped fatally shooting of a wounded and apparently unarmed Iraqi prisoner in a Fallujah mosque.

The US military today said an investigation was underway into an allegation that a Marine shot a wounded and apparently unarmed Iraqi prisoner in a mosque in the former insurgent stronghold of Fallujah.

A US Marine shot and killed a wounded and apparently unarmed Iraqi prisoner in a mosque in the former insurgent stronghold of Fallujah, according to dramatic pool television pictures broadcast today.