OTTAWA, CANADA - ONE-month-old conjoined twins died on Thursday on board an airliner that was taking them from Europe to the United States for medical treatment, a Canadian newspaper reported.

The Halifax Chronicle-Herald said on its website that the Delta Airlines jet had been about 35 minutes off the coast of the Atlantic province of Nova Scotia when the twin girls' mother noticed they were not breathing.

The paper quoted a Royal Canadian Mounted Police spokesman as saying a doctor on board the airliner had tried to help, but to no avail. The plane, en route to New York from Brussels, was diverted to Halifax, Nova Scotia, where the twins were formally declared dead.