Just before 6 p.m., officers went to the 300 block of Arroyo Drive for reports of a disturbance involving someone with a gun.

Authorities on Monday evening urged the public to avoid a South San Francisco neighborhood due to ongoing police activity.

Around 5:50 p.m., officers were dispatched to the 300 block of Arroyo Drive for a report of a disturbance involving a man armed with a gun, according to the South San Francisco Police Department. After officers arrived,