Two men and a woman were killed within 24 hours in three separate shootings in Oakland, police said Sunday.

Police have not identified any suspects in the killings, and all shooters remain at large.

The first shooting happened about 4 a.m. Saturday just blocks from the Fruitvale BART Station. Police found a man with a gunshot wound in the 1400 block of 40th Avenue in East Oakland. He was pronounced dead at the scene at 4:16 a.m., police said.

Another man was killed in an unrelated shooting about 12:15 a.m. Sunday in the 3000 block of Richmond Boulevard in Oakland’s Westlake neighborhood, near Kaiser Hospital. The victim, a 30-year-old man who suffered multiple gunshot wounds, was pronounced dead at the scene.

Less than an hour later, a 30-year-old woman was killed outside a home in East Oakland’s Webster neighborhood. Police arrived on the scene about 1:04 a.m. Shortly after, the woman was taken to the hospital, where she later died.

Friends and family identified the woman on social media Sunday as Oakland resident Lakeya Venson.

Venson was helping to clean up outside a home where her relatives had thrown a child’s birthday party Saturday, according to the East Bay Times. Several adults had stayed late to socialize and help clean up, police said.

Witnesses told police that a man began shooting at the gathering before fleeing in a car, the East Bay Times reported. Venson was the only one shot.

The three killings brought the number of homicides in Oakland this year to 17. By this time last year, Oakland had seen 24 homicides.

Police and Crime Stoppers of Oakland are offering a reward of up to $10,000 in exchange for information that leads to the arrest of the killers. Anyone with information should call police at (510) 238-3821 or Crime Stoppers at (510) 777-8572.

Marissa Lang is a San Francisco Chronicle staff writer. Email: mlang@sfchronicle.com Twitter: @Marissa_Jae