WATERLOO, Iowa (AP) — Authorities say two men suffered minor injuries after a fire broke out in a Waterloo duplex. Waterloo Battalion Chief Mike Moore says smoke alarms awakened at least one of the residents around 1:20 a.m. Friday, and she alerted other people in the building. The two men were treated at a hospital for smoke inhalation and minor burns. Two other occupants were not injured.

Firefighters limited the flames inside to just the bedroom where the fire began, but there was considerable damage to the front of the structure. The fire cause is being investigated.