Emergency personnel took some of the gunshot victims to local hospitals, with others arriving at hospitals independently.
Detectives were interviewing witnesses and reviewing video footage, the department said.
During the afternoon news conference, officials described East Deutschtown, which is divided by a highway, as a neighborhood that had been run down and poorly maintained before becoming increasingly gentrified. The mass shooting incident followed a fatal shooting on Saturday in another North Side neighborhood about four miles away.
“Even though there are drugs and some prostitution in the area, it’s not generally known as one of the major trouble spots in the city,” Cara Cruz, a public information officer for the city’s public safety department, said.
Ms. Faulkner described the area as relatively safe.
“I’m very active in the neighborhood, I walk around all the time with my dog,” Ms. Faulkner said. “I’ve never not felt safe around here.”
Ed Gainey, who was sworn in as Pittsburgh’s first Black mayor in January, criticized the city’s lack of “meaningful legislation” to curb gun violence, hinting at pending action, in a statement on Sunday.
“It is critical that we come together now to help reduce the violence currently happening while we begin to do the long-term work of ending the culture of violence that is enabling the senseless loss of life we are experiencing today,” the mayor said.