Malaysia's radar may not have tracked missing plane due to 'human error'

Malaysia may have failed to track the missing passenger plane because of human error or an antiquated radar system, according to two Chinese experts.

Li Jiaxiang, administrator of the Civil Aviation Administration of China, said human error might have added to the difficulties encountered finding Malaysia Airlines flight MH 370.

Malaysian personnel might not have detected the signal of the plane when it disappeared on Saturday, Li said.

Professor Yang Minglei, research fellow at the National Laboratory of Radar Signal Processing of China in Xian, Shaanxi province, said Malaysia might not have had a sufficiently advanced radar system to determine whether a dot on a radar screen was the missing Boeing 777.

Li said his office was aware that Malaysian authorities had denied media reports the missing jet was detected by military radar flying off course for an hour at a low altitude over the Strait of Malacca.

"Many mysteries about the plane remain, defying common sense," Li said, adding that the plane had "not been detected by radar completely".