New Delhi, Dec 28 (ANI): Expressing concern over the missing AirAsia flight QZ8501, Aviation Expert Harshvardhan on Sunday said it is an extremely worrying situation and prayed to god for the safety of the passengers. He, however, also said that there could be some internal problem but didn't rule out any external problems or the sabotage or such issues. Earlier in the day, AirAsia Indonesia confirmed that flight QZ8501 from Surabaya to Singapore lost contact with ATC at 07:24 (Surabaya LT). A statement released by Air Asia informed that nationalities of passengers and crew onboard include one from Singapore, one from Malaysia, three from South Korean and 157 Indonesia.