BOULDER CITY, Nev. (KLAS)— National Park Service rangers responded to a call that human skeletal remains were discovered at Callville Bay in the Lake Mead National Recreation Area.

The call was made around 2 p.m. on Saturday, and the Clark County Medical Examiner was contacted to determine the cause of death.

The discovery was made by two paddleboarders who say they noticed, what appeared at first glance to be a rock. However, upon further inspection, they realized they had discovered bones.

As it stands, there are no signs of foul play, sources tell the 8 News Now I-Team.

This investigation is currently ongoing. Check back for updates