In Turkey, police have launched raids in Istanbul and arrested 12 people, as the hunt for an attacker who killed 39 people in a nightclub intensifies. Deputy Prime Minister Numan Kurtulmus said authorities had fingerprints and a basic description, and vowed to speedily identify the suspect. <br/><br/>Some 600 revellers were in the Reina nightclub early on Sunday when the gunman attacked. So-called Islamic State terror group said it was behind the attack. Turkish media reports quote police sources as saying he may have been from Uzbekistan or Kyrgyzstan.<br/>