Two men have been charged with travelling to Syria for terrorism, police have said.
Yusuf Sawar and Mohammed Ahmed, from Handsworth in Birmingham, were arrested at Heathrow Airport on Monday after arriving back in the UK on a flight from Turkey.
The men, both 21, will appear at Westminster Magistrates Court in London tomorrow morning, West Midlands Police said.
Officers have said the case is not connected to the arrest of a 21-year-old from Sheldon, Birmingham, today on suspicion of attending a terrorist training camp in Syria.
West Midlands Police said the man was detained by officers this afternoon after returning to Gatwick airport on a flight from Istanbul.
Detectives have said they believe the two men arrested earlier this week travelled to Syria in May last year.
In a statement confirming the arrests, the West Midlands force urged anyone thinking of travelling to Syria to heed warnings issued by the Foreign and Commonwealth Office.
Meanwhile, Scotland Yard said it has been given extra time to question two women arrested on suspicion of being involved in the commission, preparation and instigation of acts of terrorism.
At about 9.20am yesterday, o fficers from the Metropolitan Police's Counter Terrorism Command stopped a 26-year-old woman at Heathrow Airport as she was preparing to embark on a flight to Istanbul, Turkey.
She was subsequently arrested and a large quantity of cash was seized, the force said.
A second woman, aged 27, was arrested at an address in north-west London shortly before 2.30pm yesterday.
Both arrests were intelligence-led and not in response to any immediate threat or risk, Scotland Yard said.
Detectives searched two addresses in north and north-west London under the Terrorism Act.
Warrants for further detention of the two women were obtained today at Westminster Magistrates Court today until Thursday, January 23.