The shootings happened on Thursday and Friday on the 1200 block of North Sierra Way.
Police found 30-year-old Jerald Belton dead Friday night in front of an apartment complex. Investigators say he was shot several times in the upper torso. He was pronounced dead at the scene.
Two people were shot in Thursday's shooting at the same location, and one of them died.
Police are investigating whether the crimes were gang related.
If you have any information about these shootings, you're urged to contact the San Bernardino Police Department.