Police quiz four men over 'dirty bomb' plot

Anti-terrorist police are continuing to question four men in connection with an alleged plot to buy a "dirty bomb".

Three of the men - one a Somalian national with links to Saudi Arabia - were seized by officers from Scotland Yard's anti-terrorist branch at the Holiday Inn in Brent Cross on Friday. Another man was held at his home in north London.

They were arrested under section 41 of the Terrorism Act on suspicion of the commission, preparation or instigation of acts of terrorism.

The arrests came after the News of the World passed claims to the police about a plot to buy radioactive material for a dirty bomb.

Armed police surrounded the hotel where a deal was allegedly being done to sell a kilo of radioactive "red mercury" for ?300,000.