UPDATE: Body Found in Missouri River

The cause of death for the Sioux City man found in the Missouri River is still undetermined after an autopsy.

According to police, the body of Mario Medina is too decomposed, thus making it hard to determine the cause of death.

It is believed there was no foul play.

Boaters found Medina's body Sunday morning near Weedland Boat Access, and it is still unknown how the victim ended up in the river.