YOSEMITE NATIONAL PARK, Calif. (KFSN) -- Officials are asking for the public's help after parts of Yosemite National Park were vandalized.
Pictures from the park show blue and white graffiti -- some which says "Fresno."
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On May 20, park rangers responded to reports of vandalism on the Yosemite Falls Trail by setting up a trail block to identify potential suspects.
The next day, the rangers assessed the damage and found about 30 areas along the trail spray painted with graffiti.
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Authorities are asking anyone on the trail to the top of Yosemite Falls between 6 and 11 pm on May 20 and saw people carrying spray paint, tagging, or have photos of the vandalism to submit a tip on the National Parks website.