A high-level briefing by technical experts is to be held for families of Chinese passengers on board Malaysia Airlines (MAS) Flight MH370, says Malaysia's Acting Transport Minister Hishammuddin Hussein.

"The Government is due to hold a high-level briefing soon for these families, to update them on the latest developments regarding the search for MH370,'' Mr Hishammuddin told a daily briefing on Monday.

"The briefing will include international experts who were not available during the briefings in Beijing, including experts from China. It will also be broadcasted live to other families in Beijing."

On the investigations, Mr Ahmad Jauhari Yahya, MAS chief executive, said Malaysia is unable to give details on how MH370 turned back as investigators are still looking into it.

He said the role of the airlines is to fully cooperate with the investigators. He also said the two pilots were "fully qualified" based on their background and records.

When asked about the possibility of the plane being hijacked given that no debris has been found so far, Mr Hishammuddin said the investigators continued to look into the possibility of hijack and other possible reasons for the disppearance of MH370 on March 8.

He stressed that Malaysia was not hiding anything but based on procedures, it could only give out information approved by the investigators.

"The inquiry by the air force is presently being done. I've also indicated that the Ministry of Transport is convening an international inquiry panel that will consist of all the experts around the world. In Parliament recently, we were debating whether to have a Royal Commission or a Parliamentary Select Committee to discuss this matter.

"Now all these inquiries are already in place and the truth will prevail and will be out there,'' he added.