Flight crew of the missing Malaysia Airlines Boeing 777-200 did not issue a distress call or indicate any type of emergency, the flag carrier says.

A search and rescue team has been dispatched after MH370, with 239 people onboard, lost contact with air traffic control during a flight from Kuala Lumpur to Beijing.

The aircraft lost contact with Subang ATC at around 2.40am local time March 8, Malaysia Airlines said. It was less than two hours into the flight when contact was lost and had not entered Chinese airspace. 

There are 227 passengers, including two infants, and 12 crew onboard. 

Malaysia Airlines said in another statement that it unable to establish any contact or determine the whereabouts of flight MH370. The last known position of MH370 before it disappeared off the radar was 065515 North (longitude) and 1033443 East (latitude).

"We are still trying to locate the current location of the flight based on the last known position of the aircraft. We are working with the International search and rescue teams in trying to locate the aircraft. So far, we have not received any emergency signals or distress messages from MH370. We are working with authorities and assure that all sources are deployed to assist with the search and rescue mission.

"At this stage, our search and rescue teams from Malaysia, Singapore and Vietnam have failed to find evidence of any wreckage."

Boeing issued a statement saying, "Boeing offers its deepest concern to the families of those aboard missing Malaysian Airlines flight MH370.Boeing is assembling a team to provide technical assistance to investigating authorities.

Malaysia Airlines,  which joined the oneworld  global alliance last year, has 15 777-200s in its fleet, including the missing aircraft.