LONDON - The pilot of the missing Malaysian Airlines plane made a mystery phone call just minutes before flight MH370 took off from Kuala Lumpur, it emerged on Thursday night.

Investigators are now urgently trying to work out who Captain Zaharie Ahmad Shah spoke to in the cockpit before the plane took off on March 8, British tabloid, The Sun reported on Thursday.

The phone call could hold the answer to the plane's mysterious disappearance, it is hoped.

Malaysian officials do not publicly comment on the ongoing investigations but background checks have som far not shown up any incriminating evidence on the crew or the passengers.

Malaysia's Defense and Acting Transport Minister Hishammuddin Hussein has said Captain Zaharie is considered innocent until proven guilty of any wrongdoing, and that members of his family are cooperating in the investigation.