Last Tuesday, Pittsburgh city lawmakers passed three pieces of legislation that restrict gun ownership in the city. The legislation has caused feuding among city officials, as Allegheny County District Attorney Stephen A. Zappala called out Mayor Bill Peduto and others for legislation Zappala claims is “unconstitutional.”

In a letter issued to Pittsburgh City Councilman Corey O’Connor, Zappala references a Pennsylvania constitutional law that states municipalities cannot regulate firearms. Zappala wrote, “I am certain that you realize that if such legislation passes, there is sure to be a resident of Allegheny County who seeks to file a private criminal complaint alleging a violation of (the constitution).”

The new legislation that passed Tuesday contains three parts. First, the legislation puts in place an assault weapons ban, making it unlawful to possess an assault weapon in the city. Next, there is an accessories ban, which makes firearm accessories such as bump stocks illegal in the city. Finally, the legislation allows courts to temporarily ban someone from purchasing firearms if they are deemed to be dangerous.

Tom Wolf, governor of Pennsylvania, took a stance in favor of Peduto and city council. After the shooting at the Tree of Life synagogue, Wolf has been pushing for Pennsylvania and other states to take on stronger gun legislation.

“I stand in solidarity with all those in Pittsburgh and across the commonwealth looking to make their communities safer,” Wolf said in a press release. “Earlier this year, I signed the first major gun safety bill in decades in Pennsylvania. It was long overdue, but we still have a lot of work to do, in Harrisburg and in Washington. I’ll continue to champion common sense gun safety at the state level and urge Washington to live up to its responsibilities.”

Peduto fully supports the legislation, citing public safety and common decency as the biggest reason the city of Pittsburgh needs gun reform.

“No one in America wants a country where guns make our schools unsafe for children, families afraid in places of worship, and where our streets are stained every day with innocent blood,” Peduto said in a press conference. “The morality we all share, across every race, gender, ethnicity, region and religion, compels us to take action.”

As for the threats from Zappala, Peduto doubled down on his support.

“Arrest me. You know what, I welcome him trying to put up a lawsuit that would arrest me if I sign this legislation,” Peduto said. “I would welcome that. It would be unprecedented simply because he doesn’t support gun reform or he is somehow so convinced the gun lobby is so important to his election that he would threaten to arrest legislators would support gun reform is astounding.”

Tim McNulty, communication director for the mayor’s office, said even after the legislation has passed and there will most likely be lawsuits filed. However, the mayor is standing behind the legislation.

“As for the DA, Mayor Peduto has said it is the right, and duty, of elected officials to do what is right for their constituents, and that of course includes protecting public safety,” McNulty said.