A group of self-proclaimed anarchists vandalized police cars Thursday night at the Chapel Hill Police Department Headquarters on Martin Luther King Jr. Boulevard.

Shortly after 3 a.m. someone broke the windows of three police cruisers and spray painted the words “For Luke” on one. In an anonymous blog post taking credit for the actions, the vandals say it was a gesture of solidarity with Luke O’Donovan, of Atlanta, Georgia.

O’Donovan survived an attack by a group of men shouting homophobic slurs in December, 2012. He fought them off using a pocket knife, but faced charges of aggravated assault and attempted murder stemming from the attack. O’Donovan recently accepted a plea deal and was sentenced to two years in prison.

The anarchists also cite the protests in Ferguson, Missouri as inspiration for Thursday’s vandalism.

Initial estimates put the total damage at approximately $2,200. Police are reviewing security camera footage of the incident.