A shooting that killed two young men and injured two others on Sunday reportedly occurred while the men were playing basketball at Alice Chalmers Playground in SF's Crocker-Amazon neighborhood.

The shooting happened around 4:30 p.m. on Sunday, and the initial reports suggested that it happened outside the playground itself, on Brunswick Avenue. KTVU now reports via the SFPD that the four young men may have all been playing basketball in the playground, and there are bullet holes visible on the side of the park's recreation center.

Police are saying the shooting may have been an ambush, and the suspect or suspects fled in a vehicle.

There is now a makeshift memorial with candles on the sidewalk, and the two men who were killed have been identified. They were 22-year-old Brandon Cheese of San Mateo County, and 20-year-old Kieran Carlson of San Francisco.

One witness, who says she "prayed" with the fallen men until first responders came, tells KTVU that she heard 10 to 15 shots fired.

"I just saw young men that were severely injured and a lot of blood. It was everywhere. It was terrifying," she said.

This was the second deadly shooting in San Francisco in two days, with one man fatally shot in the Bayview on Friday.

Previously: Shooting In SF's Crocker-Amazon Neighborhood Kills Two, Injures Two