An official statement said representatives of all major political parties in the state attended the meeting, which condemned the ambush of the Assembly Committee on Government Assurances team by HPC(D) cadres on March 28 last killing three policemen.
The meeting also discussed on the steps government had taken after the killing of the three policemen.
The state government had mulled outlawing the HPC(D) and declare the north eastern parts of the state adjoining Manipur, where the Hmar militants usually operated from across the state borders, as disturbed area.