Last Updated: Tuesday, 22 May 2007, 18:22 GMT 19:22 UK Five people have been killed and at least 60 hurt in an explosion in the Turkish capital, Ankara, officials say. "We have seen a vicious, ruthless terror attack at Ankara's busiest time," said Prime Minister Recep Tayyip Erdogan, who was visiting the scene. The blast occurred during evening rush hour at the entrance to a shopping centre in the