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Syrian troops, Russian jets launch attack in Ghab Plain - monitor
Insurgents advanced into the area earlier this year, building on gains that have posed a threat to the coastal region vital to President Bashar al-Assad's control of western Syria.
Rami Abdulrahman, director of the Observatory, told Reuters that troops were targeting insurgent-held areas with heavy barrages of surface-to-surface missiles, as Russian jets bombed from above.
(Reporting by Tom Perry; Editing by Louise Ireland)