Filmmaker Michael Moore has slammed snipers as 'cowards' who 'shoot you in the back' on the same weekend Oscar-tipped movie American Sniper hit cinemas.
Clint Eastwood's biopic of Navy SEAL Chris Kyle, starring Bradley Cooper, has become a box office hit since its release last week.
Taking to Twitter in rage, Fahrenheit 9/11 director Moore seethed: 'My uncle killed by sniper in WW2. We were taught snipers were cowards. Will shoot u in the back. Snipers aren't heroes. And invaders r worse.'