Two Britons, a teenager and a 32-year-old man are due to appear in court Wednesday after being charged with terrorist offenses.
Both were scheduled to appear at City of Westminster Magistrates Court in London.
The 17-year-old, from Dewsbury, was charged with possession of material for terrorist purposes and collecting information for terrorism. The suspect, whose name was not released because of his age, had been arrested on Sept. 11.
Raingzieb Ahmed, 32, has been charged with three terrorist offenses, Greater Manchester Police said. He was arrested at Heathrow Airport in London after returning from Pakistan, where he had been held on suspicion of militancy, police said.
He was charged with directing activities of a terrorist organization, possession documents useful to terrorists and possession of a rucksack containing traces of explosives allegedly for terrorist purposes.
Turkey and Russia may conclude a deal on Crimea provided that Moscow recognises the Turkish Republic of Northern Cyprus (TRNC) as an independent state