SAN FRANCISCO (CBS SF) — A head-on collision between a San Francisco Municipal Railway bus and a beer delivery truck Tuesday afternoon has resulted in a number of injuries.

The Muni bus was headed up Castro St. at Beaver St. when it collided with the truck.

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The collision smashed the driver side window of the 24 Divisadero electrified trolley bus. It appeared the delivery truck had crossed the double yellow line before the collision, according to a KPIX 5 reporter.

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The San Francisco Fire Department tweeted that there were nine people hurt, including both drivers. All those injured were being treated for a variety of non-life threatening injuries, and all were transported to the hospital.

San Francisco Metropolitan Transportation Agency spokesman Paul Rose said there were six people on the bus, including the driver.

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People were being urged to avoid the area. Castro Street was closed in both directions at Beaver St. just north of Market St.