Police shown just after shooting Tamir Rice in Cudell Park

CLEVELAND, Ohio – A Cleveland police officer fatally shot Tamir Rice immediately after leaving his moving patrol car while his partner stayed at the wheel, surveillance video shows.

The video showed Wednesday by police captures the Saturday afternoon shooting at a West Side recreation center in which 12-year-old Rice was shot.

The video contains no audio.

A rookie officer pulled the trigger, said Jeffrey Follmer, president of the Cleveland Police Patrolmen's Association.

Police were sent to the Cudell Recreation Center at Detroit Avenue and West Boulevard about 3:30 p.m. when someone called 9-1-1 to report a "guy with a gun pointing it at people."

The caller told dispatchers twice that the gun was "probably fake," but that detail was not relayed to the responding officers, Follmer said.

This is a developing story.