Police in Rialto say an 8-year-old girl has been found hanged in her bedroom and investigators are trying to determine if it was suicide or an accident.

Lt. Joe Cirilo says a frantic 911 call sent officers to a home shortly after 7 a.m. Wednesday. The girl's body was found hanging from the top of a bunk bed with a belt around her neck.

Cirilo says the girl was last seen alive less than an hour earlier, doing homework in her room. Her grandmother, who was her legal guardian, became concerned when the girl didn't respond.

The door was locked, so family members jimmied it open and found the body.

Cirilo says there's no sign of foul play. Officers checked the girl's computer, cell phone and text messages but didn't find a suicide note or any indication she was considering taking her life.