The US State Department says Secretary of State John Kerry remains focused on reaching an agreement with Iran over its nuclear energy program and plans to join the final negotiations in late June despite breaking his leg in a cycling accident in France on Sunday.

Kerry, a cycling enthusiast, was hospitalized in the Swiss city of Geneva on Sunday after the accident across the border in the French Alps.

The globe-trotting American diplomat returned to the United States on Monday for surgery on the broken leg. 

Kerry then was taken to Massachusetts General Hospital, Boston, where a surgical procedure to fix his leg was scheduled for Tuesday morning, according to his spokesman John Kirby.

Kerry’s fall comes as the United States, Britain, France, China, Russia and Germany are engaged in intense negotiations to nail down a comprehensive deal on Iran’s civilian nuclear program.

Kerry had to scrap the final parts of a multi-stop diplomatic visit that has already included meeting with his Iranian counterpart, Mohammad Javad Zarif, in Geneva.

Deputy State Department spokeswoman Marie Harf said on Monday Kerry was in "good spirits" and had telephoned several European counterparts to apologize for cancelling meetings.

She added that the secretary of state is committed "to pursuing an aggressive recovery schedule."

"Secretary Kerry's main focus for the month of June remains squarely on the Iran negotiations," Harf told reporters. "His injury does not change that. He and the entire team are absolutely committed to the same timetable and are working toward June 30th as the deadline for these talks."

Meanwhile, Kerry said in a message on his Twitter account that he was eager to return to work. "Look fwd to getting leg set & getting back to @StateDept!"

Iran and the P5+1 group – the US, Britain, France, China, Russia and Germany – reached a landmark framework agreement over Tehran’s nuclear program in Switzerland on April 2. The two sides will draft a final accord by the end of June.

GJH/GJH