Residents of a seniors apartment building on Thunder Bay's north side had a scare late Thursday morning.

The seven-storey building was evacuated this morning after fire broke out in a unit on one of the upper floors.

A total of eight fire trucks, including two aerial units, responded to the fire at Elizabeth Court at Madeline and River Streets.

Firefighters report some garbage caught fire in a unit that was not occupied at the time.

A maintenance worker entered the unit and took the burning garbage to the balcony, where he put the fire out with an extinguisher.

The maintenance person received treatment on the scene for smoke inhalation but was not taken to hospital.

No structural damage was sustained by the building, fire officials report.