West Ham United have announced Arthur Masuaku has signed permanently for Besiktas.
The Hammers confirmed the deal this morning.
The left-back, who was loaned by West Ham for Besiktas, has signed a two-year contract plus an option for a further season, as officially announced by the Istanbul team.
Besiktas triggered the purchase option of 2m in Masuaku's transfer contract.
Masuaku joined Besiktas on loan in August last year. In 27 competitive games, the 29-year-old contributed two goals and four assists.