Adhesive tape wrapped around parts of the bodies of two Osaka youths who were murdered earlier this month and found at different locations likely came from the same roll, investigators said Sunday.

They also said the stomach of one of the victims, a 13-year-old girl, contained little, indicating she had been held without eating for several hours before she died. It was unclear when the other victim, a 12-year-old boy, last ate because his body had already begun to decay.

Earlier in the day, police sent to prosecutors a man arrested for allegedly dumping the body of the girl in Osaka on Aug. 13. The girl was found with over 30 lacerations and adhesive tape wrapped around her head.