By Ben Aris in Berlin Ukraine has developed new long-range drones that can attack targets deep in Russian territory and are threatening both its oil and gas facilities near St Petersburg, the second largest city in Europe. Ukraine hit Russia’s critical Ust-Luga oil and gas complex in Russia’s northwest on January 20, a distance of some 1,400km from Ukraine’s border that could halt oil and gas champion Novatek’s exports of petroleum products entirely. The drones started a fire at the complex and narrowly missed causing much more severe damage as one drone fell only 15mn away from a full oil sto…