Turkish air strikes pounded the Syrian border region of Afrin and fighting raged on two fronts as Ankara pursued its offensive against the Kurdish enclave on Tuesday. A monitoring group and Kurdish sources said Turkey's air force had stepped up its raids on the 10th day of operation "Olive Branch", which sees Turkey providing air and ground support to Syrian opposition fighters in an offensive against Kurdish militia in northwestern Syria. Ankara has pushed forward with the operation to force the Kurdish People's Protection Units (YPG) from the region despite international concerns and reports of rising civilian casualties. In reaction to the offensive, the Kurds were not attending peace talks Tuesday aimed at resolving Syria's almost seven-year civil war being held in the Russian city of Sochi.