A woman accusing Supreme Court nominee Brett Kavanaugh of exposing himself to her when they attended Yale University in the 1980s called former classmates to back up her claims and told some of them that she couldn’t be certain Kavanaugh was the one who did it, the New York Times reported on Sunday.

The Times did not cite any sources.

The newspaper said it had interviewed a number of people to corroborate Deborah Ramirez’s story but couldn’t find anyone with firsthand knowledge of the incident.

Ramirez alleged in a New Yorker article published Sunday that Kavanaugh exposed himself to her during a dorm party when they were both freshmen, though she acknowledged she had gaps in her memory.

Kavanaugh has called the allegations a “smear, plain and simple.”