CHICAGO — Police reported of nine armed robberies within an hour on the city’s northwest side overnight.

Police reported of armed robberies in the locations below:

• 2000 Block of West Webster Ave on May 21, 2023 @ 12:27 AM
• 1200 Block of North Damen Ave on May 21, 2023 @ 12:30 AM
• 2700 Block of North Milwaukee Ave on May 21, 2023 @ 1:00 AM
• 2200 Block of West Webster Ave on May 21, 2023 @ 1:03 AM
• 2600 Block of North Kedzie Ave on May 21, 2023 @ 1:05 AM
• 2900 Block of West Armitage Ave on May 21, 2023 @ 1:08 AM
• 3000 Block of North Kimball Ave on May 21, 2023 @ 1:15 AM
• 3200 Block of North Elston Ave on May 21, 2023 @ 1:26 AM
• 3100 Block of North California Ave on May 21, 2023 @ 1:30 AM

Police described the offenders as four men between the ages of 15 and 21 wearing black hoodies, black masks and armed with handguns.