National Post reports, the first new heavy weapons have arrived on Syria’s front lines following President Barack Obama’s decision to put Western military might behind the official opposition, rebels have told The Daily Telegraph.

Rebel sources said Russian-made “Konkurs” anti-tank missiles had been supplied by America’s key Gulf ally, Saudi Arabia. National Post notes they have already been used to destructive effect and may have held up a promised regime assault on Aleppo.

More have now arrived, confirming reports that the White House has lifted an unofficial embargo on its Gulf allies sending heavy weapons to the rebels. National Post adds that unlike rocket-propelled grenades, the Konkurs – Contest in English – can penetrate the regime’s most advanced tanks, Russian-made T72s.