ISTANBUL // Turkish police detained four people in a hunt for the perpetrators of a car bombing in central Istanbul on Tuesday that killed seven police and four civilians. The third deadly attack in Turkey’s biggest city in six months targeted a bus transporting anti-riot police in Beyazit district, close to many of the city’s top tourist sites, said Istanbul governor Vasip Sahin. Thirty-six people were wounded, three of them seriously, he added. The four suspects were taken to police headquarters in Istanbul for interrogation, the state-run Anatolia news agency said, without providing further information. There was no early claim...