Australia's ocean shield also picked up suspicious pulse signal in search for the missing flight MH370, said the country's search authorities on Sunday.

Retired Air Chief Marshal Angus Houston, head of the Joint Agency Coordination Center, told a media conference two ships were sent on Sunday to the area where a Chinese vessel had picked up pulse signals consistent with a black box beacon.

"HMS Echo and Australian Defence Vessel Ocean Shield are also being directed to join Haixun 01 as expeditiously as possible to assist with either discounting or confirming the detecting," Angus Houston said.

Huston also said China has been sharing everying in the multinational search.

Chinese patrol ship Haixun 01 detected on Saturday a pulse signal with a frequency of 37.5kHz per second in southern Indian Ocean waters, which still couldn't be verified to come from the missing Malaysia Airlines plane.

The black box detector deployed by the Haixun 01 picked up the signal at around 25 degrees south latitude and 101 degrees east longtitude.

Also on Saturday, a Chinese air force plane spotted a number of white floating objects in the search area, which was approximately 216,000 square kilometers, about 2,000 kilometers northwest of Perth.