20 injured in tour bus crash in San Francisco

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Twenty people are recovering after a tour bus crashed into a construction site in San Francisco Friday. (KFSN)

Investigators said the man behind the wheel of the double decker bus was driving erratically and speeding for at least two blocks before the crash. Police say he hit a bicyclist before hitting several vehicles, and scaffolding which then fell on more cars and people in the heart of San Francisco's Union Square.

First responders had to pull people out who were pinned underneath the bus and scaffolding. "It was pretty horrific, it was gut wrenching," said John Zimmer, witness.

"We will look at everything, we will look at any mechanical malfunctions, we will look at any DUI or alcohol or narcotics as standard operating procedures go for collisions," explained Officer Albie Esparza, San Francisco Police Department.

Six people are still in critical condition.
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