Bystanders look the wreckage parts of Guwahati Puri Express at the blast site at Bhatkuchi village, about 60 km from Guwahati, on Monday, July 11, 2011. At least 50 passengers were injured as four coaches of Guwahati-Puri Express derailed following an explosion near Rangia in Assamís Kamrup (Rural) district Sunday night, railway sources said. Photo by Ujjal Deb/Indian Photo Agency