Four men have been arrested by officers looking at their trips to Syria in support of alleged terrorist activity.

A 33-year-old man was arrested at Gatwick airport at 4.17pm on Wednesday as he attempted to take a flight out of UK.

Between 6am and 6.30am yesterday, three other men – an 18-year-old, a 31-year-old and a 22-year-old – were arrested at separate addresses in east London.

A spokesman said: "They are all in custody at a south London police station where they will be interviewed by officers from the MPS's counter-terrorism command."

Jubayer Chowdhury, 24, was arrested by officers from the Metropolitan Police's Counter Terrorism Command at Heathrow Airport in November after arriving on a flight from Bahrain and is now facing charges in connection with the alleged plot.

Shajul Islam, 26, a trainee NHS doctor is accused of being part of an extremist group which held John Cantlie, who worked for various newspapers, and Jeroen Oerlemans hostage for around a week.

Islam, from east London, was arrested at Heathrow Airport in October. He is accused of being a doctor for the jihadi group which kidnapped the journalists. Islam is in custody pending a trial.