RUSSIA is on track to run out of anti-drone missiles by February, military experts have told The Sun.

They said Vladimir Putin’s troops are firing them faster than they can be replaced.

The shortage could force Kremlin chiefs to stretch their defences more thinly and leave some targets totally exposed.

The shortage is affecting Pantsir missiles , which are used to shoot long range one-way attack drones .

It comes as Ukraine hits Russian oil refineries on an almost nightly basis — sending the price of petrol soaring.

Moscow is scrambling to ramp up missile production, but UK officials believe it could take months for it to make a difference.

A top defence source said: “Based on current trends they are due to almost run out by February.”

They cautioned: “We need to be car

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