Looks like there may be a copycat to the theater shooting at a temple in WI.
Gunman opens fire at Sikh temple in Wisconsin; 7 dead - U.S. News
Apparently he was armed with a handgun.
I don't know whether or not it is legal to carry into churches in WI or not. The guy was shot outside the temple by a LEO. The guy was in his 30's and didn't have an extensive criminal record only minor offenses.