COPS want to contact a woman who says rapper Nelly sexually assaulted her after a UK gig.
The allegation is included in the US lawsuit of a second woman who alleges he raped her on his tour bus.
Essex Police were alerted to December’s alleged Southend attack by US reports.
An Essex Police spokesman said: "We have checked our records and don't appear to have received a report of this incident.
"Specially trained officers are now making contact with the solicitors in a bid to contact the victim to take a report."
They plan to contact the Seattle-based lawyer bringing the rape claim to view details of the UK allegation by the unnamed woman.
Nelly, 43 — real name Cornell Iral Haynes Jr — denies the allegations and is countersuing.
Student Monique Greene, 22, is suing the rapper after prosecutors dropped the case because she would not testify.
The lawsuit also alleges a third woman was sexually assaulted after Nelly's show at Koko, in Camden, North London in June 2016.