GENEVA (AP)--The U.N.'s top humanitarian official criticized Israel Friday for sealing off borders and blockading harbors, saying such actions violated international law and had grave consequences for civilians. Jan Egeland was equally critical of armed Arab extremist groups in southern Lebanon and Gaza for abducting Israeli soldiers and provoking violence in the Middle East, but said Israel's military reaction has been excessive. "It is wrong. It is in violation of international law, and it is also in violation of common sense," he told reporters at the U.N.'s European headquarters in Geneva. "You are supposed to do something to the armed...