SALINA-Law enforcement authorities in Saline County are investigating a case of sexual exploitation of a child.

Austin Cart, 21, Salina, allegedly exchanged sexually explicit pictures and messages with a 17-year-old girl between April 29 and June 18, over a social media site on the Internet, according to Salina Police Captain Chris Trocheck.

Cart was arrested on requested charges of sexual exploitation of a child, and promoting obscenity to a minor.

He was booked into the Saline County Jail Thursday evening.