From NBC Bay Area:

After the federal Transportation Security Administration came out with a warning Tuesday about terrorists using trucks as weapons, truck drivers at the Port of Oakland said they’re on alert.

It’s happening all over the world, and the Department of Homeland Security is asking truckers across the U.S. to be vigilant. Many truckers at the port said they already take precautions and know now is not the time to be complacent or they could be the next target for terrorists.

The new advisory encourages more vigilance from the nation’s trucking industry. Among the recommendations: keep trucks locked while parked and in slow moving traffic.

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