OMAHA, Neb. -- Fire crews responded to a house fire in Omaha early Sunday morning. 

Around 4:30 a.m., the Omaha Fire Department responded to a house fire located at 508 N 85th St. 

Authorities said that crews saw smoke and flames when they arrived, and a working fire was declared. 

Officials said a single occupant evacuated prior to OFD arrival. 

The person was transported to Nebraska Med Center in serious condition. 

The cause of the fire is under investigation.