Turkish police have detained four people over a car bomb attack which killed five people and injured 68 in the southeastern city of Diyarbakir. The four are suspected of links to Thursday's bombing in the Kurdish-majority city, Turkish prosecutor Durdu Kavak said. The bomb was set off remotely and targeted a military bus as it passed through the city centre, officials say. Kurdish separatists have carried out bombings in the region before. The blast on Thursday caused a huge blaze, igniting several vehicles. Some of those who died were students, Turkish officials said. At least 30 soldiers were among the injured. Police said they suspected Kurdish militants. Diyarbakir is the biggest city in the mainly Kurdish south-east. Speaking in the capital, Ankara, Prime Minister Recep Tayyip Erdogan condemned the blast as a "terrorist act". Turkish troops are fighting Kurdistan Workers' Party (PKK) rebels both inside Turkey and in nearby northern Iraq. In December Turkish...