DUBAI, United Arab Emirates (AP) — The U.S. Navy says it has seized an arms shipment of thousands of assault weapons, machines guns and sniper rifles hidden aboard a ship in the Arabian Sea. An American defense official told The Associated Press that the Navy’s initial investigation found the vessel came from Iran, again tying the Islamic Republic to arming the Houthis despite a United Nations arms embargo. The seizure, one of several amid the yearslong war in Yemen, comes as the U.S. and others try to end a conflict that spawned one of the world’s worst humanitarian disasters. The arms shipment, described as sizeable, shows that the war may still have far to run.