ANKARA - Turkish President Tayyip Erdogan said on Saturday that a major military operation was underway in the Syria's northwest province of Idlib, which Free Syrian Army rebel groups earlier said they were preparing to enter with Turkish backing. 'There is a serious operation in Syria's Idlib today, and this will continue,' Erdogan told members of his AK Party in a speech. Much of Idlib is currently controlled by an jihadist-led alliance of fighters. 'We will never allow a terror corridor along our borders in Syria,' Erdogan said. 'We will continue to take other initiatives after the Idlib operation.'