The AP might have made up this story entirely.
Failing that, they might have paid some people to pretend to be Mayan priests and to pretend to 'purify' the site.
Failing that, these Mayan priests are most likely frauds on their own account without AP's involvement but people who are certain of getting US press notice for 'purifying' things.
And I didn't know there were Mayans that far south.
Uh... Guatemala is majority Mayan.