Looters who have taken American Indian artifacts from the Four States region have until today to turn in the plundered items without fear of retribution.

That's when the 90-day artifact amnesty program set up by the U.S. attorneys in Utah, Colorado, New Mexico and Arizona comes to an end.

The program allows the return, with no penalty and no questions asked, of anything of cultural, historical or traditional importance to Indian tribes that was taken illegally from the region.

Six sets of human remains, pottery shards and grinding stones have been returned in Utah under the program.