In Assam, Security of oil installations, railway tracks and other vital establishments of the state have been beefed up following ULFA extremists triggering three explosions within a week. According to Inspector General of Assam police (security), Mr. G P Singh, the security of oil installations and other vital installations has been reviewed with officials of concerned companies, CISF and police officials in Upper Assam. Chief Minister Tarun Gogoi had hinted that operations against ultras will be intensified. It may be recalled that the ULFA extremists blew up tank wagons carrying high speed diesel and petrol on November 16. Besides causing damage to tracks, the explosion also charred 12 wagons and derailed four others. ULFA’s 28 Battalion, which has been laying low for almost a year after two companies of the battalion declared ceasefire, was believed to be behind this explosion. Commander of 28 Battalion, Bijoy Chinese called up some media houses and claimed responsibility for the explosion. An improvised explosive device (IED) was recovered from Khoirabari railway station in Udalguri district on Monday. Around 5 kg TNT was also recovered from Udalguri. Intelligence inputs suggest ULFA is planning more strikes prior to November 27. <br/>