Four bombs Wednesday shook Istanbul and Ankara, damaging U.S. and other Western targets but causing no casualties, said police who linked them to the Persian Gulf war.

The underground organization Dev Sol, or Revolutionary Left, took responsibility for the blasts, saying it detonated the bombs to protest Turkey's alliance with the U.S.-led multinational force seeking to drive Iraq out of Kuwait.The explosions were the latest in a series that began a week ago.

Meanwhile, the Greek terrorist group November 17 claimed responsibility Wednesday for a series of recent bombings and rocket attacks against Western interests, saying it acted to protest the U.S.-led war against Iraq.