Clashes broke out Saturday between Kurdish forces and Islamic State group fighters near a Syrian prison where dozens of jihadists are still holed up, a war monitor said. An IS assault on the sprawling Ghwayran prison complex near the northeastern city of Hasakeh on January 20 sparked days of heavy fighting that has left some 270 people dead, and a bulldozer shovelled corpses onto a truck on Saturday to take some for burial. The US-backed Syrian Democratic Forces (SDF) announced they had recaptured the prison on Wednesday, but that mop-up operations continued. On Saturday, there were “clashes i…