Two teenagers turned themselves into police, today ... and, admitted they vandalized a cave near Wendover.

As we reported, yesterday ... graffiti was found written over ancient rock art, in Juke Box Cave.

It included two names ... "Kayla" and "Tony G."

Today ... two people with those names surrendered ... after friends told them about our broadcast.

An investigator, says ... they admitted to the graffiti.

But, NOT to any of the digging in the cave ... or, to bending the bars on a security gate.