Biggest Ukraine investor alarmed over coal blockade

The biggest foreign investor in Ukraine expressed alarm Thursday over a weeks-long blockade of railway lines for transporting coal between the separatist east and the rest of the ex-Soviet state.Global steel giant ArcelorMittal expressed concern over the stoppage and said its operations near the war zone had been affected by the "challenging situation".ArcelorMittal bills itself as the world's largest integrated steel and mining company.