(KUNA) -- Turkish police have arrested a man in connection with a car bombing last week, which killed six people and injured several others in the south-eastern city of Diyarbakir. The suspect is a member of the outlawed Kurdistan Workers' Party (PKK) who was trained at camps in northern Iraq, the Turkish NTV news network reported on Tuesday.One of the injured in the bombing died of wounds earlier in the day, taking the bombing death toll to six, the NTV said. Turkey has blamed the PKK for the attack, which came after Turkish warplanes had launched several strikes on PKK targets in northern Iraq. The bomb was set off remotely as a military bus was passing through the city centre. On Monday, the PKK released a statement, saying it was investigating the possibility that some of its militants may have planted the bomb - acting on their own behalf. Kurdish separatists have carried out bombings in the region before. The blast caused a huge blaze, igniting several vehicles.