BART trains in both directions were sacked with major delays through San Francisco just before 5 p.m. Wednesday, due to police activity between 16th Street and 24th Street stations in the Mission. (Update: trains are clear as of about 5:30 p.m.)

KRON4 News and SF Weekly are both reporting SFPD and BART Police officers have stopped trains and cleared the tracks so they can search for a wanted suspect. A BART spokesperson was unsure how a foot chase ended up on the tracks, but most of the police activity was limited to 24th Street.

No word on how long your delays will be, or what happened to the suspect, but we'll update as we know more. For now, BART officials are recommending those who need to head south to Daly City should ride Muni or look for other transportation.

Update 5:30 p.m.: Although it still isn't clear whether the suspect was caught, BART and San Francisco police officers have confirmed the tracks are clear. BART trains are starting to resume service, but residual delays will be significant.

Update 5:35 p.m.: According to chatter on the BART Police scanner, there were two reports of a suspect possibly hallucinating and urinating on the platform, although that is still unconfirmed at the moment. (It may also be separate incident. Update: It was, see note below.)

Update 5:55 p.m.: The Chronicle is now reporting one suspect was caught and taken into custody, but there may have been additional suspects. Bay City News reports the chase started when a suspect stole a laptop on the 24th Street platform.