A suicide bomber blew himself up in the centre of Istanbul on Sunday, wounding 15 people, the city's police chief said. "We think it was a suicide attack," said police chief Huseyin Capkin, adding that two of the wounded were in a serious condition. Six of the injured were civilians and nine were police, he said. Turkish television said the attack targetted anti-riot police. The blast happened in Taksim Square, a major shopping and leisure district on the European side of the city. A security cordon was thrown round the area and the nearby pedestrianised Istiklal street was closed off, the CNN-Turk and NTV reported.