By Ben Aris in Berlin Pavel Durov has been in custody in France for a day, but there is still no official information about the arrest itself or the claims against him. French authorities say he was arrested for refusing to cooperate in criminal investigations and Durov is being charged with complicity in illegal activities that were carried out with the help of his platform. An official statement from the Paris prosecutor’s office is expected on August 26. Durov flew to France from Azerbaijan on a business jet. He was detained by the police at about 8pm local time, immediately after the plane…