Seven people were injured and a San Francisco intersection was shut down for about an hour today when a Municipal Railway light rail vehicle and a tractor-trailer truck collided near the city’s Potrero Hill neighborhood.

San Francisco fire Lt. Ken Smith said the crash happened at about 3:35 p.m. at the intersection of 22nd and Third streets.

Preliminary reports indicate the John Christner Trucking tractor-trailer and T-Third Street light rail vehicle were both traveling south on Third Street when the truck turned left in front of the Muni vehicle, Smith said.

The official cause of the collision remains under investigation by San Francisco police, Sgt. Wilfred Williams said.

The intersection opened at about 4:45 p.m.

Twelve people were initially evaluated and seven were taken to area hospitals to be treated for injuries that appeared to be minor to moderate, Smith said.

Neither driver involved in the crash was injured.

The driver of the Muni vehicle will be tested for drugs and alcohol and placed on non-driving status as part of standard procedure, Muni spokesman Judson True said.

The collision disrupted service on the T-Third Street line, True said.


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