After a rash of shootings over the last week that left three people dead and at least six wounded, Pittsburgh Police Chief Nate Harper said he plans to increase police patrols in Oakland and the hilltop communities of Beltzhoover, Allentown, Mount Washington and St. Clair Village.

"The OK Corral is not in the city of Pittsburgh," said Chief Harper at a press conference this afternoon. "This is unacceptable behavior."

Chief Harper said there would be at least 18 additional officers on the streets in those neighborhoods on Thursday, Friday and Saturday nights.

He faulted some community groups for not expressing more outrage after the death of 15-year-old Raymond Reese last weekend in a shooting on Pasadena Street on Mount Washington. He called on groups like the NAACP, the Urban League and BPEP to use their influence in the communities to try to end the violence.

Police will be stopping young people under 18 who are out past the city's curfew, Chief Harper said. In July and August, the city's curfew requires that youths younger than 17 be off public streets by 11 p.m. Sunday through Thursday and by midnight on weekends (the curfew starts an hour earlier in other months).

The number of homicides in the city so far this year is 34, up from 30 or 31 at this time last year, police said.