The Iowa City Fire Department is investigating the cause of a fire that occurred early Sunday morning.

According to a press release, the Iowa City Fire Department responded to a fire at 434 S. Johnson St. at 3:17 a.m. with three engines and a ladder truck, 14 firefighters, and a battalion chief.

Officials said the porch and front door of the two-story house were on fire when they arrived, and firefighters brought the fire under control in 20 minutes.

The release said all people evacuated the house prior to the firefighters’ arrival, and the fire was reported after a smoke detector alerted an occupant.

The fire was completely extinguished after 40 minutes, according to the release, and there were no injuries.

Crews remained on the scene for approximately two and a half hours; the estimated damage is $75,000.

— by Hayley Bruce