A new faultline opened up between Ukraine and Russia over natural gas on Thursday when pro-Russian rebels in east Ukraine accused Kiev of cutting off supplies to them amid sub-zero temperatures. Russia said it had started supplying gas to the rebel-controlled regions of Donetsk and Lugansk, while Kiev said supplies had been interrupted temporarily after heavy fighting damaged pipelines. More On this topic IN Europe The gas dispute broke out less than 24 hours after thousands of Ukrainian troops were withdrawn from the ruined town of Debaltseve as it was captured by the rebels. The seizure of the town was a significant defeat for Kiev’s forces and threw into doubt a new ceasefire signed in Minsk last week. Late on Wednesday Petro Poroshenko , Ukraine’s president, called for UN and EU peacekeepers to monitor the ceasefire. But the proposal was swiftly rejected by Moscow and Russian-backed rebels in east […]