A series of bombings on Turkey's Mediterranean coast and in the commercial center of Istanbul has left 27 people wounded, including 10 British tourists, officials report. At least three explosions late Sunday left 21 people wounded in the popular coastal resort town of Marmaris in southwest Turkey, CNN Turk reported. Meanwhile, six people were wounded in Istanbul, three of them seriously, the network reported, citing local authorities and witnesses. Police sources told CNN Turk the blasts were the result of bombs. There was no immediate claim of responsibility for the attacks. In London, the Foreign Office said 10 British citizens were hurt in the blasts, and four of them were in serious condition.