LONDON: British prosecutors have charged two men with trying to join the self-styled Islamic State (IS) extremist group in Syria.

The Crown Prosecution Service said Tuesday that 24-year-old Junead Ahmed Khan and his 22-year-old uncle Shazib Ahmed Khan have been charged with trying to join the extremist group.

They were arrested last week in Luton, north of London.

A third man who had been arrested on suspicion of terrorism at the same time has been released without being charged.

British officials say some 700 Britons have traveled to Syria in support of the militant group.