It isn't hugely important , and some people will find it insensitive to bring it up so soon after the Batman massacre. But, since reporters and editors get paid to relay coherent information:
CNN has said several times that the shooter was armed with "an AK-47-type weapon, and a rifle, and two handguns."
Mayor Bloomberg is, quite unexpectedly, not worried about an appearance of insensitivity. He was immediately in the papers and on the air with his standard demand that police confiscate the firearms of everyone who did not shoot up a theatre last night.