Prince George’s police are probing three incidents over the weekend that resulted in the deaths of three people.

Spokesman Cpl. Clinton Copeland said police have no suspects or a motive in the shooting death of an adult man at 6:40 p.m. Saturday in the 1400 block of Kanawha Street in the Langley Park area.

Police also are investigating a pedestrian death that a spokesman said may have been accidental, even thought it appeared to stem from an attempted robbery just before 1 a.m. Sunday in Fairmount Heights. Several masked suspects armed with handguns had ordered several people to lie down on the ground in the 1200 block of Oates Street, and a car operated by a woman who police believe was startled ran over one of the victims, Copeland said.

In the third incident, a tow truck hit a woman who was crossing the street at the intersection of University Boulevard and Riggs Road in the Langley Park area, a community where police and public officials in recent years have stepped up efforts to decrease accidents involving pedestrians and drivers. An adult woman died in the incident. Police believe a second, dark colored vehicle also may have struck the woman, but fled the scene.

Police are notifying next of kin in all three incidents, Copeland said, before releasing names of victims.