ISTANBUL: Police have detained four suspects over an Istanbul car bombing that targeted a police bus on Tuesday, killing 11 people in the third deadly attack to strike Turkey’s biggest city this year. The attack in Istanbul’s Beyazit district, close to major tourist sites, killed seven police officers and four civilians, state media said. Another 36 people were wounded, three of them seriously, Istanbul governor Vasip Sahin said. UN chief Ban Ki-moon led international condemnation of the bombing, which his spokesman called a “despicable terrorist attack”. The four suspects were taken to police headquarters in Istanbul for interrogation, state-run news agency Anatolia agency said.