SF Bay Bridge closed after discovery of suspicious device

Authorities temporarily shut down the San Francisco-Oakland Bay Bridge after a suspicious device was found, snarling traffic on both sides of the crossing on a busy Friday afternoon.

Authorities were notified around 1 p.m. about the device on the Treasure Island on-ramp, California Highway Patrol Officer Sam Morgan said. The island is midway across the span.

Morgan said officials decided to close lanes and cleared all vehicles from the bridge nearly an hour later.

Authorities reopened the westbound lanes, then the eastbound side, around 3:30 p.m. when San Francisco police neutralized the threat.

No further details on the device were released.

The closure caused a ripple effect on roadways into and out of San Francisco.

Traffic is typically heavy on Fridays, but it was expected to be exacerbated by several stadium events in the region. Thousands of drivers were heading to San Francisco Giants and Oakland A's home games, and a Jay-Z and Justin Timberlake concert at Candlestick Park.

The bridge carries about 280,000 vehicles a day between San Francisco and heavily populated cities to its east.