(CNN) Rep. Keith Ellison is denying allegations made public on Saturday that he physically abused an ex-girlfriend.

The allegations were detailed in a Facebook post by Austin Monahan, the son of Ellison's former girlfriend Karen Monahan. The son wrote that he found a video on his mother's computer in 2017 that allegedly showed the Minnesota Democrat attempting to drag his mother off a bed while cursing at her.

CNN first spoke with Karen Monahan on Friday and Saturday about social media posts she'd made, some obliquely referencing Ellison. CNN was in the process of reporting the story when her son went public Saturday afternoon. CNN has asked to view the video, but Monahan said she could not produce it.

The charges came just days before a Tuesday primary election in which Ellison is running to be the Democratic nominee for Minnesota's attorney general. On Sunday, two of Ellison's Democratic primary opponents, state representative Debra Hilstrom and Minneapolis attorney Matt Pelikan, called on him to respond to the allegations.

Ellison denied the claims on Sunday and said no video of the incident existed because it did not happen.

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