A gunman opened fire Monday morning in a restaurant near Jack London Square, instantly killing two patrons and wounding four others, police said.

One of the wounded was in grave condition, and the others are expected to recover.

One of the men killed was a 26-year-old Oakland resident. His name was not released pending notification of relatives. Police were trying to confirm the names of the other victims.

The shooting happened about 12:45 a.m. Monday inside Sweet Jimmie’s, 311 Broadway. The restaurant has no security.

There were 10 to 15 patrons and employees inside when the shooting occurred. They were diving for cover and trying to run away from the gunman.

Sgt. Tony Jones said the gunman “”appeared to be firing indiscriminately at patrons.”” Police are trying to determine why.

The gunman escaped before police arrived.

The two men killed were pronounced dead at the scene. The other victims who were hit, both men and women, were taken to hospitals.

Broadway between 3rd and 4th streets was shut down for several hours to allow police and crime scene technicians to investigate.