Traffic is once again flowing on northbound Interstate Highway 280 in San Francisco after a minor-injury collision blocked a segment of the roadway Thursday morning, a California Highway Patrol sergeant said.

Located just north of U.S. Highway 101, the crash was reported by a driver at 4:56 a.m. and involved three vehicles, CHP Sgt. John Carman said.

Emergency medical personnel from the San Francisco fire department responded to the scene of the crash and transported an unknown number of victims who sustained minor injuries, Carman said.

At one point, all but one lane of traffic were blocked by the crash, which was cleared from the roadway by 5:26 a.m., Carman said.