LONDON - A serving British soldier has joined Kurdish Peshmerga forces fighting Islamic State (IS) insurgents, Sky television reported on Thursday.
Sky said the man, who is not being named, had told family and friends he intended to spend a year in the Middle East.
He had been on leave from the British Army at the time he left for the region, it added.
A British Ministry of Defense spokesman said: "We are aware of these reports and we are looking into them."
Sky said the man had been in the army since leaving school at 16 and was known to have been been learning Arabic. It was not known exactly where he had gone.
No further details were immediately available.