Graffiti at Grand Canyon sparks search for vandals

The National Park Service is looking for information about two people who may have vandalized rocks in Grand Canyon National Park.

A visitor at the South Rim of the park observed a man and a woman spray-painting the phrase "Evans 16" in black on a rock near the Yavapai Geology Museum on May 22, according to a park service news release.

The visitor took photos of the people and the graffiti, but the couple left before U.S. park rangers could contact them.

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Special agents for the Investigative Services Branch of the National Park Service and U.S. Park Rangers of Grand Canyon National Park are seeking information about them.

More than 1,000 people shared the Grand Canyon National Park's Facebook post about the vandalism within an hour of it being posted Monday morning.

Those who saw or recognizes the people are encouraged to contact the National Park Service by calling its tip line at 888-653-0009; sending an online tip; or sending an email or a message on Facebook.