Authorities in Ireland are investigating UFC star Conor McGregor regarding an alleged sexual assault that occurred in Dublin in December, according to Tariq Panja of the New York Times.
The Irish Times' Conor Gallagher and Ronan McGreevy reported in January that police had questioned a "sportsman" about an alleged assault on Dec. 9 and released him from custody.
Panja noted McGregor hasn't been formally charged.
Early Tuesday morning, the former UFC featherweight and lightweight champion announced he had "decided to retire from the sport formally known as 'Mixed Martial Art.