AURORA, Colo. — The suspect has been identified in a shooting spree that left at least 12 dead and more than 50 wounded at a midnight premiere of the latest Batman movie.

James Holmes, 24, was taken into custody and identified by federal law enforcement officials. The officials spoke on condition of anonymity to discuss an ongoing investigation.

Authorities did not release a motive. The FBI said there was no indication the shooting is tied to any terrorist groups.

Besides the shooting victims, others were being treated for chemical exposure apparently related to canisters thrown by the gunman. Some of those injured are children, including a 3-month-old infant who was shot.

Aurora police spokesman Frank Fania this morning said he didn’t know yet if all the injuries were gunshot wounds. He said some might have been caused by other things, such as shrapnel.