The fire in a vacant building was reported around 5:25 a.m., according to a statement from the Omaha Fire Department. Firefighters arrived to find flames on the outside of the building at 1127 N. 20th St.

It took about 30 minutes to extinguish the fire, at which point two people were found inside the building and arrested, the statement said.

The building, valued at $645,500, sustained an estimated $5,000 in damage. The cause of the fire is under investigation.