Background check on all passengers from the Chinese mainland aboard the missing MH370 did not find any evidence that they might have hijacked or launched terror attack on the jet.
Chinese Ambassador to Malaysia Huang Huikang said on Tuesday, Xinhua reported.
Quoting Reuters, Times of India adds: Ambassador Huang Huikang told Chinese reporters that Beijing had carried out a detailed investigation of the Chinese passengers and could rule out their involvement, state television said on one of its official micro blogs.
Huang said a lot of the information involved criminal matters which were "not suitable to publicize," however gave no other details.
"The probe into the incident's cause is not suitable to be conducted in a high-profile way," he said.
No trace of flight MH370 has been found since it vanished soon after taking off from Kuala Lumpur bound for Beijing early on March 8 with 239 passengers and crew on board.
About two-thirds of the passengers were Chinese.
Huang said there were multiple reasons for the confusion and rumours about what had happened to the aircraft, including Malaysia's "lack of experience."
A search of unprecedented scale involving 26 countries is under way, covering an area stretching from the shores of the Caspian Sea in the north, to deep in the southern Indian Ocean.