After the expanded search and rescue operation to detect the whereabouts of the missing Malaysia plane, Boeing 777, latest update report said on Sunday, Vietnamese authorities spotted an object which suspected was one of the plane’s doors of the missing aircraft with 239 people aboard.

According to the official of Vietnam’s National Committee for Search and Rescue operation team, quoting the information received from the Vietnamese plane in the actual search operation that they had found two broken objects, which seem like those of an aircraft, located about 50-mile (80 kilometers) to the south-west of Tho Chu Island which is also near to the oil licks found on Sunday. But according to Civil Aviation Authority of Vietnam, it was too dark to be certain to confirm the spotted debris as a part of the aircrafts. Search planes were set to return to investigate the suspected debris at daybreak.

Investigating team will consider at two areas, the maintenance of the aircraft and the possible terrorist attack in the since of the two reported passengers using the fake passport documents.

But according to the FBI sent by the United States to investigate, US officials stressed there was no evidence of terrorism yet.

The 11-year-old Boeing 777-200ER, powered by Rolls-Royce Trent engines reportedly took off on Saturday at 12:40 a.m. (1640 GMT Friday) from Kuala Lumpur International Airport, with 227 passengers and 12 crews on board.