Superintendent of Police Arabinda Kalita told PTI that the IEDs were strapped to the pipeline at a place near Udalguri village under Tengakhat police station.
Acting on a tip-off, the police launched a search operation since this morning to trace the explosives. They recovered the IEDs at around 5.30 pm.
The IEDs weighed around five kilogramme each and would have caused major destruction, Kalita said. "We have sought assistance from the Army to defuse the explosives and a team is on the way from the Dinjan Army Camp."
The Police were continuing search operations in the area to ensure that no other explosives are concealed.
Intelligence sources said a group of ULFA cadres led by Raktajeet Hazarika and Jayanta Handique were active in the area and were most probably involved in the attempt to blow up the pipeline.