U.S. media reports say at least 10 people were shot to death and more than 30 were wounded in a shooting at a movie theater in a suburb of Denver Colorado.

Police say the midnight premier of “The Dark Knight Rises, the latest Batman movie, had just begun at a theatre in the city of Aurora, when a masked man at the front of the theatre stood up, faced the packed crowd, and started randomly shooting. Witnesses said he fatally shot an infant at point-blank range.

Police say they immediately apprehended the shooter, but believe an accomplice may be at large.

Authorities called in a bomb squad and are searching the theatre for exploding devices.