"Manmohan Singh is the man who colluded and conspired against Assam -- his own state from where he was elected to Rajya Sabha -- by not giving oil royalty at pre-discounted rate.
"With him, Tarun Gogoi (former chief minister) had also colluded and conspired," Sarma said at a press conference in the Assembly complex.
Stating that Gujarat High Court had awarded oil royalty at pre-discounted rate to Gujarat, Sharma noted the Singh government had moved the apex court against the decision, a step which had a direct bearing on Assam.
Sarma said the current government at the centre has asked the PSU oil companies to pay the royalty on pre-discounted price with effect from January 1, 2014 and Rs 1,480 crore for the same was released two days ago for Assam.
The Finance minister also made a statement inside the House on the same issue when it was raised by AGP MLA Pabindra Deka.