PHOENIX (AP) — A court hearing is scheduled for two founders of the classified advertising site Backpage.com in a case in which they are accused of knowingly running ads for sexual services.

The hearing will be held Monday for Michael Lacey, James Larkin and five employees of the site who are charged in the case.

READ MORE: Mesquite Police Identify Officer Killed In Shooting, Vigil To Be Held Sunday

All seven have pleaded not guilty.

An indictment filed in late March accuses the site of ignoring warnings to stop running advertisements promoting prostitution, sometimes involving children, because the lucrative enterprise brought in half a billion dollars.

READ MORE: 1 Killed, 3 Injured In Arlington Car Accident

In related cases, Backpage.com CEO Carl Ferrer has pleaded guilty to a federal conspiracy charge in Arizona and money laundering charges in California.

The company also has pleaded guilty to human trafficking in Texas and money laundering conspiracy in Arizona.

MORE NEWS: No. 3 Cincinnati Claims AAC Crown, Possible Playoff Spot

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)