Bomb threats cleared out a Society of Professional Journalists panel over the weekend that featured key proponents of the GamerGate movement.

Michael Koretzky, director of the SPJ Region 3, said the event was hit with bomb threats via social media throughout, but it wasn't until a specific threat came in that they were taken seriously.

Conservative blogger Milo Yiannopoulos and feminism critic and right-wing think tank member Christina Hoff Sommers were among the GamerGate figureheads on the panel.

The panel discussion was originally slated as a debate, but none of GamerGate's critics accepted the invitation.

A post in the "GamerGateHQ" section of imageboard 8chan claimed responsibility for the threats, though it has since been deleted by moderators.

The post read, "Hey lads, I'm the one who sent the bomb threat. [...] I actually just sent the same email to a few news outlets and the local pd. It was like 3 sentences long, top f***ing kek."

No explosives were found at the scene.

GamerGate began a year ago as a coordinated harassment campaign against indie game developer Zoe Quinn.

Since then, the leaderless group has rebranded itself as a protest against corruption in journalism, but has struggled to distance itself from an image of harassment and misogyny.