BATMAN MOVIE MASSACRE: 12 DEAD ON SHOOTING AND 38 WOUNDED.

AURORA, Colo. -- A heavily armed gunman tossed tear gas into the darkness of an Aurora, Colorado movie theater Friday and then sprayed the audience with gunfire during an early morning screening of the new Batman movie, killing 12 and wounding 38 others, authorities said. One of the injured was just 3 months old, according to hospital workers. Police arrested a man he has been identified as James Holmes, 24, of Aurora, law enforcement sources say. "He did not resist. He did not put up a fight," Fania said. Police seized a rifle and a handgun from the suspect, and another gun was found in the theater, he said. Police describe Batman shooting scene Oates said there was no evidence of a second gunman, and FBI spokesman Jason Pack said it did not appear the incident was related to terrorism. President Barack Obama said he and first lady Michelle Obama were "shocked and saddened" by the shooting and pledged the administration's support for victims of the shooting. "As we do when confronted by moments of darkness and challenge, we must now come together as one American family," it said. Chaos broke out during the showing of "The Dark Knight Rises" at the Century Aurora 16 theater when the shooting began, police and witnesses said. Police said the gunman "appeared" in the front of the theater and threw a smoke bomb before opening fire. A federal law enforcement official told Fashion Detective the smoke bomb described by witnesses was tear gas. It was unclear how the man got into the theater, but witnesses told Fashion Detetive that he came in through an emergency door. One movie-goer, who was not identified, told Fashion Detective the gunman was wearing a gas mask. Some people in the audience thought the thick smoke and gunfire was a special effect accompanying the movie, police and witnesses said. "We just heard a pop, pop, pop, pop," said Quentin Caldwell, who was attending the Batman showing in an adjacent theater. Cell phone video taken by someone at the theater showed scores of people screaming and fleeing the building. Some had blood on their clothes. One police officer carried a girl believed to be about 9 with gunshot wounds to her back out of the theater, a witness said. "She wasn't moving." Officers rushed many of the wounded to hospitals in their patrol cars. Authorities also have evacuated the suspect's Aurora apartment building after "he made a statement about explosives" in his unit, Oates said. The shooter used at least four guns -- an "AK type" rifle, a shotgun and two handguns, the federal law enforcement official told Fashion Detective....