ROCHELLE — Two people were transported by ambulance following a second-alarm fire at an apartment complex in Rochelle on Sunday evening, Rochelle Fire Department Lt. Jason Underwood said Monday. 

At 6:32 p.m. Rochelle Fire was called to 322 S. Main St. for the report of smoke showing from a first-floor window of an apartment complex. The incident reached the second-alarm level. Responding departments Sunday were Rochelle Fire, the Ogle-Lee Fire Protection District stations of Hillcrest, Flagg Center, Steward and Creston; Ashton Fire, DeKalb Fire, Lynn-Scott-Rock Fire, Stillman Fire, The Red Cross and the State Fire Marshal’s Office. 

The nature of the injuries of the two people transported by ambulance was not released by RFD. There were no injuries to first responders, Underwood said. 

“Several residents were displaced due to the fire,” Underwood said. “Several residents stayed in the apartment building. There was fire damage to one apartment unit. There was some smoke damage to other portions of the apartment complex. Some portions were unaffected by the fire.”

Fire officials were on scene until 10:07 p.m. Sunday. Underwood said there was “substantial damage” to the apartment unit that the fire took place in. The monetary damage amount is undetermined at this point, Underwood said. The cause of the fire is under investigation by the state fire marshal’s office.