A shooting shortly before noon on Friday in Northwest Washington left a teenager dead and a man wounded, according to D.C. police, who were investigating two crime scenes a half-mile apart.

The incident occurred about 11:50 a.m., and police said it may have started with a shooting at Princeton Place and Warder Street NW, in the Park View neighborhood.

Assistant Chief Stuart Emerman, a patrol chief, said police responded to that intersection and found a vehicle that had been damaged from gunshots. He did not say whether anyone was in the vehicle.

Moments later, Emerman said, police found a second vehicle that had struck a parked car about a half-mile away in the 600 block of Upshur Street NW, in Petworth, near Grant Circle Park and New Hampshire Avenue.

Emerman said two people with gunshot wounds were inside that vehicle. One had injuries not believed to be life-threatening; the other died. Emerman said detectives had not definitively linked the two scenes, but he told reporters that “we do believe they are related.”

No arrests have been made. Police identified the teenager who was killed as Kassius-Khon Glay, 16, of Northwest Washington.

Police in the District are also investigating a fatal shooting of a 39-year-old man on Thursday afternoon in Northeast Washington.

The shooting occurred about 4:30 p.m. in the 100 block of Sheridan Street NE, near the Lamond Recreation Center. It is near the border with Maryland.

Police identified the victim as Bret Desmarteau. A police report lists addresses in Odenton, in Anne Arundel County, Md., and in the Northeast Baltimore community of Hamilton.

Authorities said they were searching for a four-door gray sedan with tinted windows.