OTTUMWA, Iowa (AP) -

Authorities are investigating an assault on a 2-year-old boy at his home in Ottumwa.

Police say the boy was found unresponsive at the home on Monday evening. He was taken to Ottumwa Regional Health Center, and then flown to University of Iowa Hospitals and Clinics in Iowa City. Hospital spokesman Tom Moore said Thursday that he didn't have any information on the boy.

Investigators searched the home on Tuesday, but no arrests have been reported. No other details about the little boy's case have been released.