Kathmandu, 10 April: An operation to separate the 11-month-old Siamese twins Ganga and Jamuna Shrestha at a hospital in Singapore is continuing for an unprecedented fourth day Tuesday.

Latest reports from the Singapore General Hospital said the twins were in a stable condition. Doctors began the operation Friday 0800 GMT.

Surgeons are encountering new challenges as the marathon procedure progressed. The twins joined at the head were born at the Prashuti Griha in Kathmandu. The twins underwent six months of meticulous preparation in Singapore for the rare surgery. “The girls vital signs have remained stable and both the surgical and anaesthetic teams are happy with the progress,” the Hospital said in a statement.

Nepalis in Singapore, island residents and Singapore Airlines are financing the operation and other costs. The Shresthas come from suburban Kathmandu.