OAKLAND (CBS SF)/BCN) — East Oakland residents were evacuated Monday night after a homeowner found a modified hand grenade and reported it to police, police said Tuesday.

Officers were dispatched at 8:53 p.m. to the 600 block of Capistrano Drive to investigate the discovery.

READ MORE: Police Officers Denied Service At San Francisco Restaurant Triggering Negative Reviews, Social Media Backlash

Police said the grenade was found when the homeowner was cleaning.

READ MORE: SF Civic Center BART Station Reopens After 2-Hour Closure Sunday Morning

The Alameda County Sheriff’s Office bomb squad removed the grenade and told police it might be live because it had been modified. Residents returned to their homes after the area was made safe, police said.

MORE NEWS: Bob Dole Dead at 98

© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Bay City News Service contributed to this report.