RICHMOND -- A 33-year-old Sacramento man who was among four people shot in Richmond over the weekend remained in critical condition Monday morning.

Police have not released the name of the man wounded in the Sunday afternoon shooting. He was shot three times outside his grandmother's single-story home in the 100 block of South 20th Street at about 1:30 p.m. on Sunday, police said.

The man was shot in the ankle, buttocks and the chest, police said. He was airlifted to John Muir Medical Center in Walnut Creek and was expected to survive, police said. No arrests have been made.

Three others shot over the weekend are expected to be OK, although one of them is still in critical condition after a shooting in front of Uncle Sam's Liquors at 3322 Cutting Boulevard on Saturday, police said.

Officers were called to the liquor store at 6:10 p.m. on Saturday, where they found one person wounded in front of the store. That person was taken by ambulance to an undisclosed hospital and was in critical but stable condition Monday morning, police said.

Two others wounded in the Saturday shooting showed up at Kaiser Richmond with injuries to their legs, police said. Neither one was cooperating with the investigation, police said.

Anyone with information about any of the shootings is asked to call Richmond police at 510-233-1214.

Rick Hurd covers crime. Contact him at 925-945-4789 and follow him at Twitter.com/3rdERH.