MISSOULA, Mont. — Greg Gianforte, the Republican candidate in Montana’s special congressional election, was accused Wednesday night of assaulting a reporter for the Guardian who had been trying to ask him a question. Gianforte, who is seen as the slight favorite in an election that ends Thursday, left what was supposed to be a final campaign rally, at his Bozeman headquarters, without giving a speech.

The Gallatin County sheriff’s office said Wednesday evening that it was “currently investigating allegations of an assault involving Greg Gianforte.”

In an audio recording published by the Guardian, Jacobs can be heard asking Gianforte to respond to the fresh CBO score of the American Health Care Act, a bill he’s said he was glad to see the House of Representatives approve. According to Alexis Levinson, a reporter for BuzzFeed, Jacobs had followed the candidate into a room where a camera was set up for an interview, before the event began.

“We’ll talk to you about that later,” Gianforte says in the audio.

After Gianforte tells Jacobs to direct the question to his spokesman, Shane Scanlon, there is the sound of an altercation, and Gianforte begins to scream.