JERUSALEM: A Hamas leader in the West Bank died in Israeli custody, Palestinian authorities and the militant group said Friday. Mustafa Muhammad Abu Ara, 63, died after being moved from a prison in southern Israel to a hospital, according to a joint statement by the Palestinian Authority’s prisoners affairs body and the Palestinian Prisoners’ Club watchdog. “We mourn the passing of the leader and prisoner Sheikh Mustafa Muhammad Abu Ara and hold the occupation responsible for his assassination through deliberate medical neglect,” Hamas said in a statement.