New Hampshire authorities are investigating a case of criminal mischief at the state library, where a granite block noting President Trump’s 2016 primary win was destroyed early Friday.

According to a statement from New Hampshire State Police, a trooper responded at 7:45 a.m. to a report of the vandalism at the library, located near the State House in Concord.

He saw a line of granite blocks along a sidewalk adjacent to Park Street in front of the library. The blocks were squares measuring about a foot across, police said.