A 20-year-old British man has been arrested at Heathrow airport on suspicion of assisting terrorism in Syria.
The Briton is the second man to be arrested at the busy airport on suspicion of terror offences today.
Earlier, a 19 year-old was held on suspicion of preparing for acts of terrorism in what police described as a "Syria-related" incident.
Police said the two arrests are not connected. Both men remain in custody in London.
More top news
Hazmat suits are in rapid production as China beefs up its defences amid fears it will pay a big price for £131bn business ties with Africa.
A bright start to November but feeling cooler as temperatures drop.
Mild evening rounds off October ahead of cooler temperatures over the weekend.