Three men were killed and a third person was wounded in shootings in the District early Saturday and Sunday, one in Northwest and the others in Southeast, according to police.

The shootings in Southeast occurred about three hours apart, but there was no indication that they were related — one was in Anacostia, the other three miles south near the border with Maryland.

The latest slaying occurred about 3 a.m. Sunday in the 3500 block of Georgia Ave. NW. Police said 40-year-old Simon Anderson was found lying on the ground with several gunshot wounds. He was pronounced dead on the scene.

On Saturday about about 5:20 a.m., police said an officer responding to a call for a shooting in the 2600 block of Douglas Road SE found 48-year-old Terrence Robinson of Southeast suffering from multiple gunshot wounds.

Police said he was pronounced dead at a hospital.

About three hours earlier, at 2:13 a.m., police said they responded to the 800 block of Barnaby St. SE and found two victims who had each been shot several times.

Police said 24-year-old Antwan Boseman of Southeast was pronounced dead at a hospital. The other victim survived and was being treated at the hospital.

Authorities said no arrests have been made, and information about a motive was not released.