DETROIT (CBS DETROIT/AP) — Four people at a Detroit senior citizens apartment complex had what were described as minor injuries following a fire that gutted the building according to authorities.

It happened Monday night at The Reverend Ann Johnson Elderly Apartments on the city’s east side.

READ MORE: Police Seek Detroit Man Accused Of Fatally Shooting Cousin

The Detroit Fire Department Deputy Commissioner David Fornell says officials have accounted for everyone in the building.

Most of the 54 units were occupied and some residents may have had guests said Fornell. He also said residents included people on oxygen and in wheelchairs.

READ MORE: Police: Woman Walking On I-75 In Troy With 55-Gallon Drum On Head Arrested

It’s reported four tenants had minor injuries, a firefighter was treated for heat exhaustion and two police officers suffered smoke inhalation.

This is an ongoing investigation.

MORE NEWS: City Targets Packard Plant, Other Old Industry Sites To Improve Detroit Neighborhoods

© 2019 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this story.