Brown University is investigating an incident of anti-gay and anti-Semitic vandalism.

According to the Brown Daily Herald, somebody scrawled “Gay will die” and “Holocaust 2.0” in black marker in the hallway of Marcy House, a campus building that houses Beta Rho Pi, a Jewish fraternity, and Zeta Delta Xi, a co-ed fraternity with many LGBT members.

Students discovered the graffiti early Friday.

The incident follows the cancellation of a speech by author and transgender advocate Janet Mock. Mock was scheduled to appear on Monday, March 21. An online petition asking Mock to distance herself from event co-sponsor Brown RISD Hillel gained 160 signatures. Petition organizers have accused Hillel of defending “Israeli state policies of occupation and racial apartheid.”

Beta Rho Pi and Zeta Delta Xi called the incident a hate crime.

“We are devastated and outraged that this anti-Semitic and homophobic hate crime – and to be clear, this is a hate crime – occurred in our home,” the fraternities said in a joint statement.

President Christian Paxson said that the school would work “aggressively” to identity the person or persons “who committed this hateful act and hold them accountable to the fullest extend of the law.”