British surgeons have successfully separated Sudanese twins joined at the top of their heads, and the babies are now recovering well.

Officials of London's Great Ormond Street Hospital and the charity group Facing the World, which funded the operation of 11-month-olds Rital and Ritag Gaboura, announced the medical feat on Sunday. The operation took place on Aug. 15.

The Gaboura twins' condition is known as craniopagus, and it occurs once in every 2.5 million births. Babies with the condition are usually either born dead or die within 24 hours after birth.

While the condition is rare, surviving an operation is extremely rare. Separating them surgically is dangerous because it might cut the bloodflow to the brain and damage it. In the case of the Gaboura twins, who were born to a Sudanese mother, Ritag supplies blood to her sister's brain.

The Gaboura parents, who were not identified, thanked the doctors, Facing the World and others who supported them financially and emotionally.

David Dunaway led the surgical team from the plastic surgery and craniofacial unit at Great Ormond Street. He is also a trustee of Facing the World.

Facing the World also funded the flight of the twins and their parents from Khartoum, Sudan, to the U.K. The twins were delivered by caesarian section in the Sudanese capital.

"The Gaboura family have been extremely brave throughout a very stressful journey, and their love for their children is clear to see. It is a testimony to the support of the British public that we are able to do any of the charity work that we do," Dunaway said, according to BBC.