LONDON - Police said they arrested a 19-year old man at Heathrow airport on Saturday on suspicion of 'preparing for acts of terrorism' in relation to Syria. The man is being held at a police station in London and an address in the north of the city is being searched, the Metropolitan police said in a statement. Officers from the Counter Terrorism command unit made the arrest but police said it was not in response to any immediate risk or threat. They said the arrest was 'Syria-related' but no further details were available.