A Winthrop University athletic trainer is accused of making a threat against the building where former President Donald Trump was holding a rally.

The rally was held Friday at the school’s campus in Rock Hill.

PREVIOUS: Former President Trump rallies supporters in Rock Hill

Police arrested Jeffrey Lahr on Thursday. According to witnesses, he’s accused of yelling “I hope this whole place blows up. Boom!”

Police said the witnesses contacted the Secret Service. Lahr told agents his comments were a joke and said he wasn’t going to follow through, but was aware of the rally.

He’s charged with disorderly conduct.

(WATCH BELOW: Nikki Haley says she won’t drop out of presidential race after SC primary loss)