PITTSBURGH — Pittsburgh’s mayor has signed gun-control legislation passed by City Council in response to the synagogue massacre. Opponents immediately filed suit Tuesday to block it. Democratic Mayor Bill Peduto signed the legislation into law in a ceremony at the City-County Building. He says the community has come together "to say enough is enough." Pennsylvania law prohibits local regulation of guns and ammunition, and a coalition of gun-rights groups filed a lawsuit minutes after Peduto signed the bills. The legislation restricts military-style assault weapons like the AR-15 rifle that authorities say was used in the rampage at Tree of Life Synagogue that killed 11 and wounded seven. It also bans most uses of armor-piercing ammunition and high-capacity magazines, and allows the temporary seizure of guns from people who are determined to be a danger to themselves or others.