MARIN COUNTY (CBS SF) — A multi-vehicle collision Tuesday afternoon snarled eastbound traffic on the Richmond-San Rafael Bridge for two hours, according to the California Highway Patrol.

The collision was first reported at about 4:40 p.m. around mid-span. The collision reportedly could involve as many as six vehicles and initially blocked all eastbound lanes of the bridge.

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By about 5:15 p.m., just the left lane was blocked. Authorities didn’t clear the blocked lane for over an hour.

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Motorists were advised to use eastbound CA-37 as an alternate route during the lane closure. Drovers were told to expect some residual delays.

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There were no details regarding any injuries in the crash.