MENLO PARK, Calif. (KGO) -- Police activity closed all lanes of the Dumbarton Bridge early Monday morning.
Lanes were closed from 3:30 a.m. to 4:30 a.m. Authorities did not say what caused the police activity.
[Ads /]
No injuries have been reported and traffic has been back to normal.
Stay with ABC7 News for the latest details on this developing story.