Fatah gunmen abducted a Hamas official in the West Bank city of Ramallah on Monday, saying they would exchange him for the kidnapped nephew of a Fatah strongman, Palestinian police said. On Sunday, gunmen in Gaza kidnapped the nephew of Fatah official Muhammad Dahlan, security officials said. Though all those abducted were supposed to be freed under Sunday evening's cease-fire, he was not, security officials said. In retaliation, Fatah gunmen in Ramallah kidnapped Arafat Said, an Interior Ministry official, as he left his office. They also shot a man who was walking with him in the legs, security officials said. Both men were Hamas supporters.