The SFPD bomb squad is responding to Seventh & Bryant after an alleged bomb threat was made at a tow yard in the area. It's likely that the tow yard in question is the AutoReturn tow yard at 450 7th St. 

Police have shut down the Seventh Street exit on the I-80 freeway, as well as Bryant Street in both directions from Sixth to Eighth streets, in order to respond to what they are calling a "suspicious incident."

According to NBC Bay Area, the Hall of Justice, located at nearby 850 Bryant St., is also on lockdown: 

#BREAKING: San Francisco's Hall of Justice has been placed on lockdown.

— NBC Bay Area (@nbcbayarea) October 20, 2016

Public is advised to shelter in place while #SFPD investigates the suspicious incident.

— San Francisco Police (@SFPD) October 20, 2016

We'll update as we learn more. 

Update, 12:35pm: The Hall of Justice is being evacuated. 

850 Bryant Hall of Justice being evacuated @nbcbayarea pic.twitter.com/gQTaakQlwG

— Jaxon Van Derbeken (@jvanderbeken) October 20, 2016

Meanwhile, the threatened bomb does indeed appear to be at AutoReturn, where it is believed to be inside a car. A note attached to the car reportedly indicated that a bomb may be inside it.

BREAKING: Possible bomb found inside car at AutoReturn in the 400 block of Bryant Street in SF, per employee pic.twitter.com/ifhDpO78Ou

— Michael Bodley (@michael_bodley) October 20, 2016

Traffic and transit have been affected, with Muni slowdowns and reroutes in effect.

ATTN: #SFPD activity from 6th to 7th btwn Harrison & Bryant. The 8, 19, 22, 27, & 47 affected in both directions.

— SFMTA (@sfmta_muni) October 20, 2016

Update, 1:15pm: A bomb squad robot is investigating the vehicle.

#BREAKING @SFPD robot checked out trunk of suspect vehicle near 7th and Bryant. Robot just backed away from car. @nbcbayarea pic.twitter.com/5nDmQCW1aG

— John Zuchelli (@tvzuke) October 20, 2016

Traffic nightmare near the SF Hall of Justice. @SFPD says suspicious vehicle found parked below highway overpass. pic.twitter.com/gyTZGBR73U

— Michelle Roberts (@Michelle_NBC) October 20, 2016

Update, 2:32pm: The SFPD has announced that the scene has been "rendered safe" and lifted the shelter in place order.

#SFPD has rendered the scene safe & lifted the shelter in place. Streets will reopen shortly. Avoid area if possible due to traffic. #SF

— San Francisco Police (@SFPD) October 20, 2016

KTVU also notes that freeways have reopened but traffic delays continue.

SF bomb threat update: All closures on I-80 and US-101 are open. Expect residual delays in area

— KTVU (@KTVU) October 20, 2016