UPDATE: Person who ran into BART Transbay Tunnel taken into custody

BART police have taken a person into custody who ran into the Transbay Tube from Embarcadero Station earlier this evening, causing major delays for BART riders throughout the Bay Area.

BART officials first learned of the person entering the tunnel underneath the San Francisco Bay shortly after 6:30 p.m., according to spokesperson Chris Filippi.

The trespasser caused major delays of more than 20 minutes systemwide while police searched the tube for him. Trains continued to run through the tunnel but were moving at very slow speeds on manual control.

Filippi said trains will now return to normal speeds through the tunnel. However, delays of 20 minutes or more may persist for some time while BART officials work to get back on a normal schedule.

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