Ministry of Public Security said the information was confirmed after Interpol examined and matched the identity information of all foreign passengers on board with its lost ID database.
A team sent by the ministry is currently cooperating with the Malaysian side to jointly investigate the stolen ID case in Malaysia, state-run Xinhua news agency reported.
Two impersonators travelled by the flight MH370 posing as an Italian and Austrian.
Contact with Malaysia Airlines flight was lost on Friday as it was flying over the Ho Chi Minh city air traffic control area in Vietnam.
A large-scale search operation by multiple countries is going on in the area but they have not found any clue so far.
