Rome — Four-month-old twins, a boy and a girl, from Greece who were joined at the temple were successfully separated during surgery at a Rome hospital, a hospital official said.

The twins were doing well Sunday, a day after the operation, said an official in the infant neurosurgery department of Rome's Policlinico Gemelli hospital.

"Tutto bene," or "Everything's fine," the official said, declining to be named or provide further details.

The ANSA news agency, citing sources outside the hospital, said the surgery had lasted 12 hours and involved two teams of upwards of 20 doctors and nurses, headed by Italian Dr. Concezio Di Rocco.

It said the surgery was less complicated than other separations of joined twins since the infants didn't share any organs.

The twins were born June 13 at the Ippokratio Hospital in the northern port city of Thessaloniki under a veil of secrecy. They were joined at the temple, but they did not share a brain.

According to information in Greece, the family decided to take their children to Italy after the twins' uncle, a doctor, recommended an Italian doctor he had known professionally. They arrived in Rome last week from Thessaloniki.

The twins' parents have insisted on strict confidentiality about the infants' identities and conditions.