19 injured when San Francisco trolley collides with bus

A San Francisco trolley collided with a Muni bus Wednesday morning, injuring 19 and shutting down a major city traffic artery, KTVU.com reported.

The crash occurred just after 11 a.m. on 6th and Market, the report said. Four people were transported to a nearby hospital, the report said. None of the injuries are life threatening. The others were treated at the scene.

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