SAN FRANCISCO (CBS SF) — Two people traveling in a vehicle along a highway offramp in San Francisco were shot and injured Monday afternoon, authorities said.

The California Highway Patrol said the officers responded to reports of a crash involving two vehicles on the San Jose Ave. offramp from northbound Interstate 280 just after 1 p.m. Monday.

One of the vehicles had fled the scene by the time officers arrived. Two people at the scene were suffering from gunshot wounds and were taken to the hospital, the CHP said. Additional details and the victims’ conditions were not immediately known.

The incident temporarily closed I-280 at San Jose Ave. at 1:35 p.m. About 20 minutes later, they said the highway lanes had reopened but the San Jose Avenue off-ramp remained closed with no estimate for reopening.

Video from Chopper 5 showed a number of police vehicles surrounding a dark-colored Honda sedan that had been involved in the crash on the side of the ramp.