U.S. Secretary of State John Kerry underwent surgery Tuesday for a broken leg sustained in a cycling accident, and his doctor said he expects a speedy recovery for the top American diplomat.

"The procedure was uncomplicated, the fracture was fully repaired, and we plan to get him up walking on Wednesday," Dennis Burke, the doctor who performed the operation at Massachusetts General Hospital, said in comments provided by the State Department.

"I anticipate a short hospitalization, a full and complete recovery, and a return to normal function," he said. "I do not anticipate that this will interfere with his duties as secretary of state."

The surgery was performed under a regional anesthetic and Kerry was conscious throughout the four-hour operation, the doctor said.

Earlier in the day, State Department spokesman John Kirby said Kerry was resting and in good condition.

Kerry broke his right femur on Sunday while riding a bicycle near the French town of Scionzier. He had been in nearby Geneva for Iranian nuclear negotiations ahead of a June 30 deadline for a deal. He was flown to his hometown of Boston on Monday on a U.S. military aircraft. (Yonhap)