Some drywall fell from the ceiling outside Arizona Department of Economic Security offices on the northwest side Monday. Four people waiting outside the offices were hit by the falling debris.

Courtesy of Northwest Fire/Rescue District

Four people were struck by drywall that fell from a ceiling during a wind storm at a northwest side strip mall on Monday.

The four were waiting for their appointments at the Arizona Department of Economic Security, which has offices at the shopping center, 3912 W. Ina Road.

The four were in a breezeway where a large piece of drywall fell and hit them, said Capt. Adam Goldberg, a spokesman for the Northwest Fire/Rescue District.

Two people were treated at the scene and taken to a hospital with minor injuries, a third was treated and released and the fourth person denied injury, Goldberg said in a news release.

Marana building officials believe that a wind gust may have brought air into the roof vents causing the drywall to break free and fall. Recent rains were ruled out as a cause, Goldberg said.

The DES offices remained open, with officials telling clients to use another entrance until repairs are made.