A barn fire left six horses dead in northwest suburban unincorporated Harvard, Illinois, overnight. 

Just before midnight, firefighters were called to a pole barn on the 19100 block of Crowley Road that had caught fire with animals inside. 

Firefighters had limited access to water, so the fire was upgraded to a second-alarm fire. For the hour-long fire response, water tenders and portable tanks were brought in from neighboring departments. 

A total of six horses died in the fire, Harvard officials said. 

No other injuries were reported. 

The barn was significantly damaged and considered a total loss. 

The cause of the fire remains under investigation by the Harvard Fire Protection District.