San Mateo officials are asking people to avoid the area of Bayshore Boulevard and Monte Diablo Avenue due to police activity on Saturday afternoon.
The police department sent the alert at around 12:50 p.m., and did not provide any details as to what was happening.
The department said it would provide an update when the area was clear.
This is a developing story. Check back for further information.
Get a weekly recap of the latest San Francisco Bay Area housing news. Sign up for NBC Bay Area’s Housing Deconstructed newsletter.
