Junior Ajose, 36, and Cheriff Tall, 21, were shot dead in the early hours of 21 June 2020 in a car park off Caythorne Street in the Moss Side area. Both men were shot in the head and died in hospital. They did not know each other.
The suspect was detained in Turkey and transported back to England on Saturday, where he was met at Stansted Airport by GMP officers. He remains in custody.
Detective Chief Inspector Neil Higginson, from the force's major incident team, said the arrest demonstrates the force's unwavering commitment to securing justice for the victims and their loved ones. He noted that over the past six years officers have carried out multiple warrants, analysed evidence, examined seized devices and pursued every opportunity to identify those responsible.
Police estimate that between 300 and 400 people were present in the car park that night. A £50,000 reward remains available for information that leads to the conviction of the killer. The force has renewed its appeal for anyone with information about the full circumstances of the night or any outstanding suspects to come forward.