In Assam , train services between Guwahati and Upper Assam have been restored after repairing the damaged track in Sibsagar district on Monday afternoon.Train services to Upper Assam had been disrupted since last night following a powerful blast on the railway track between Bhojo and Langpotia by suspected ULFA militants. The blast led to killing of two anti-talk faction ULFA militants when they were planting a powerful bomb on railway tracks to target long-distance trains in the district.Meanwhile, security forces have been placed on high alert across the State, including the border districts with Nagaland and Arunachal Pradesh, to thwart militants’ threat.