In the Mission District at around 7:40 PM, a suspicious package has caused a street closure at 20th between Valencia and Guerrero.

A shelter in place is also in effect.

#UPDATE: Police have shut down 20th Street at Valencia in SF while they investigate a suspicious package. Avoid area. pic.twitter.com/OaDcaa0A3g

— ABC7 News (@abc7newsBayArea) March 31, 2014

We'll update as soon as we know more.

Update: Police say it's safe. Streets have reopened.

#UPDATE: Suspicious package at 20th Street and Valencia in San Francisco deemed safe. Police are reopening streets.

— ABC7 News (@abc7newsBayArea) March 31, 2014