Russia has built up a “substantial” military presence including ground troops in Syria, according to the Nato secretary-general.
Jens Stoltenberg told journalists that Vladimir Putin’s forces have not mainly been targeting Isis, but other opposition groups.
“I will not go into any specific numbers but I can confirm that we have seen the substantial build-up of Russian forces in Syria - air force, air defences but also ground troops in connection with the air base they have,” he continued.