( Reuters)-Kazakhstan's anti-corruption body has detained a nephew of former president Nursultan Nazarbayev, it said on Sunday, the latest in a series of moves against his family. Nazarbayev, 81, resigned as president in 2019 but retained sweeping powers as the head of the security council and the leader of the ruling party, and backed then-ally Kassym-Jomart Tokayev as successor.In January, protests over a jump in fuel prices turned violent in several major Kazakh cities, and Tokayev stripped N