MORONI, COMOROS - A 14-year-old girl who survived the Yemenia airline crash Tuesday is being treated in a hospital in the Comoros where she is in a state that is 'not worrisome", a Comoros Red Cross spokeswoman said.

'The girl, aged 14, has arrived at the El Maarouf hospital. We were told that her condition is not worrisome,' Red Cross spokeswoman Ramulati Ben Ali told AFP.

Ben Ali said only one survivor had been found so far after the Yemeni Airbus jet with 153 people crashed into the Indian Ocean as it came in to land in the Comoros islands.

A man identified as one of the girl's rescuers told France's Europe 1 radio that the teenager was seen swimming in choppy waters in the middle of bodies and plane debris around 4:00 am (0100 GMT).

'We tried to throw a life buoy. She could not grab it. I had to jump in the water to get her,' the rescuer said.

'She was shaking, shaking. We put four covers on her. We gave her hot, sugary water. We simply asked her name, village.' A Comoran government spokesman also confirmed that the girl is the only survivor so far and that she is from the southeast village of Nioumadzaha.

'She is conscious, she is speaking, but we are trying to warm her' after being pulled from cold sea waters, said Ada Mansour, the examining doctor at the hospital where the girl is being treated.

Mansour added that the earlier reports of a five-year-old boy surviving the crash were 'based on information received from boats near the search site. But I have not seen him.'

The French army has arrived from Reunion with zodiacs and other equipment, and a French helicopter will take part Wednesday in the search operations at sea, said Comoran government spokesman Kamaleddin Afraitane.

'Technicians from Yemen arrived in Moroni this afternoon with investigators to determine the cause of the accident,' he added.