SAN FRANCISCO (CBS SF) — BART is recovering from a major delay in all directions after an obstruction on the track in the Tranbay Tube had to be cleared Thursday afternoon, according to the transit agency.

WATCH: CBSN Bay Area – 24/7 Digital News Channel from KPIX 5

READ MORE: Meier Scores Franchise-Record 5 Goals As Sharks Rout Kings, 6-2

The @SFBARTalert Twitter account posted about the delay at 2:42 p.m.

The transit system is currently single-tracking trains through the Transbay Tube until the obstruction can be removed crews and the track inspected to ensure it is safe to reopen.

READ MORE: COVID: Lower Levels Of Viral RNA In Wastewater May Signal Turning Point In Surge

The website has a special section to provide advice on other public transit options during the disruption.

About a half an hour later, the SFBARTalert Twitter account posted that the system was recovering from the earlier problem, but noted there was still a 20-minute delay in the Transbay Tube.

MORE NEWS: UPDATE: Firefighters Battle Fire In Abandoned Home In San Jose