PORTLAND, OR --Cellphone video captured a group of people knocking over a popular sandstone rock formation known as the "Duckbill" on an Oregon beach.
Oregon State Parks officials originally said they didn't think the break at the site frequented by tourists was caused by humans.
But the video obtained by KATU-TV shows the visitors pushing the structure until it crumbled to the ground on August 29 at Cape Kiwanda State Natural Area.
The sandstone pedestal was roughly 7 feet to 10 feet across and located in a fenced off section of the park.
David Kalas says he was helping a friend film part of the coast with his drone when they noticed about eight people trying to push the pedestal down. Kalas says he started recording with his cellphone when it began wobbling.
The Oregon State Parks and Recreation Department said Monday it will review the incident and takes vandalism seriously.