Russia on Tuesday warned Saudi Arabia against supplying Syrian rebels with shoulder-launched missile launchers, saying such a move would endanger security across the Middle East and beyond.

The Russian foreign ministry said in a statement that it was “deeply concerned” by news reports that Saudi Arabia was planning to buy Pakistani-made shoulder-launched surface-to-air missiles and anti-tank systems for armed Syrian rebels based in Jordan.

It said that the aim was to alter the balance of power in a planned spring offensive by rebels on the regime of President Bashar al-Assad.