“Iran will send missiles, drones and more advisers to Syria, a senior Iranian official said on Friday, as rebel forces pushed their lightning offensive south towards the city of Homs in the biggest challenge for years to President Bashar al-Assad's rule. Seizing Homs would cut off Syria's capital Damascus from the coast, a longtime redoubt of Assad's minority Alawite sect and where his Russian allies have a naval base and air base. After years locked behind frozen front lines, the insurgents have burst out of their northwestern Idlib bastion to achieve the swiftest battlefield advance by either side since a street uprising against Assad mushroomed into civil war 13 years ago. Assad regained control of most of Syria after his key allies - Russia, Iran and Lebanon's Hezbollah group - came to his support. But all have recently been diverted by other crises, giving Syrian Sunni Muslim militants a window to fight back.”