House Minority Leader Nancy Pelosi denied on Thursday that her personal computer was breached by a hacker, but did call it an “attempt by Russia” to influence the election.

The statement came after a self-proclaimed hacker known as Guccifer 2.0 leaked files that he claimed to have obtained from a personal computer held by the Democratic leader. They were the latest in a string of files purportedly exfiltrated in a breach of the Democratic Congressional Campaign Committee.