"The central and state governments have failed to evolve a coordinated policy to tackle the menace of illegal immigrants in Assam and also for effective border management," Sonowal told a party workers' meet here.
He accused Congress led governments of playing politics with the issue which, he said, had led to serious demographic distortion threatening the identity of the indigenous people of the state.
Sonowal expressed unhappiness with the unfinished barbed-wire fencing on the border and alleged that the state government
