Thirteen people, including five police officers, were injured in two explosions in the southern Turkish city of Adana, the state news agency Anatolian said on Friday, according to Reuters. The explosions took place in the city centre of Adana, which is home to an air base used by U.S. forces. Police director Mehmet Cebe said no one had claimed responsibility for the blasts which also damaged four police cars and some shops. "One person has been seriously injured and taken to the university hospital," said Cebe. He said the first explosion had wounded two bank security guards, adding a second blast wounded five policemen who had come to the area. Kurdish, leftist and Islamist militants have all carried out bomb attacks in Turkey in the past.