The list of foreign regulators includes delegates from Indonesia and Ethiopia, where the two crashes occurred before the plane was grounded worldwide in March. In all, 346 people died.
A Vietnamese official says searchers on ships worked throughout the night but could not find a rectangle object spotted Sunday afternoon that was thought to be one of the doors of a missing Boeing 777.
A South Korean official says both U.S. and Korean investigators have been interviewing the pilots who were in the cockpit when an Asiana Airlines plane clipped a seawall before crash landing at San Francisco International Airport Saturday.