Two children died in a house fire in Beloit early Sunday morning, according to the Beloit Fire Department.

Firefighters responded around 3:47 a.m. to a home in the 1100 block of Hinsdale Avenue after reports of a fire with heavy smoke.

Crews searched the home while fighting the fire. During that search, firefighters found two children who had died.

An adult was also found inside and was taken to a hospital. Officials have not released that person's condition.

The cause of the fire remains under investigation.