Update: Lt. Tyrone Forte tells us that someone called BART police at about 8:23 a.m. reporting there was a person armed with a weapon at the Embarcadero station. The cops halted all the trains while they searched the entire station as well as the trains.
They found nothing, and trains were moving again just before 9 a.m, albeit slowly.
Original story: We're getting word from BART that commuters should expect major delays this morning due to some sort of police activity at the Embarcadero.
According to BART, trains are delayed by about 15 minutes at Embarcadero in the SFO, Millbrae and East Bay directions. We've put in a call to the transit agency to get more details about what's happening and how much longer you'll be standing around the platform.
Check back for updates.