OAKLAND (CBS SF) — A suspect or suspects fired on a vehicle on Interstate 880 near 23rd Avenue in Oakland around 4:15 a.m. Sunday, sending three people to the hospital, the California Highway Patrol said.

A group of partygoers summoned an Uber — a Toyota Highlander around 4:15 a.m., the CHP said. The Highlander was heading southbound on I-880 when the occupant or occupants of a second vehicle opened fire in what the CHP called a targeted attack.

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Three men in the Highlander, including the Uber driver, were hit by gunfire and taken to the hospital, according to the CHP.

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All traffic lanes of southbound Highway 880 were temporarily closed as investigators searched the area for evidence. All lanes have since been re-opened, the CHP said.

The CHP is asking that any witnesses or people with knowledge of the incident come forward by calling (707) 551-4100.

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