Turkey shot down a drone on Friday in an incident highlighting the dangers of multiple air combat operations over Syria, where government troops and their allies backed by Russian jets have launched an offensive against rebels near Aleppo.
The army offensive south of the city, backed by Hezbollah and Iranian fighters, further expands its 10-day-old counterattack in western Syria against insurgents battling to overthrow President Bashar Assad.
The army campaign has been coordinated with Russian jets, which began airstrikes in support of Assad on Sept. 30, and Syria's own air force.