One person was injured when Puri-New Delhi Neelachal Express hit a road roller and derailed near Bhadrak, about 120 kilometers from Bhubaneswar. Railway officials said about 10 bogies of the express train- No 12875 and the engine derailed after hitting the road roller crossing the track at an unmanned level crossing at Rambhila, about 10 kilometers from Bhadrak railway station this afternoon. Bhadrak station manager R N Biswas said, while the roller driver was seriously injured, no train passenger sustained any injury. The driver was admitted to a hospitalat Bhadrak. Train services on the main Chennai-Howrah track were affected following the mishap and several trains were stranded at Bhadrak and Balasore.