The earlier ceasefire agreement between the two sides is due to expire tomorrow.
The new ceasefire extension agreement was signed by Shambhu Singh, Joint Secretary to the Union Ministry of Home Affairs (NE), on behalf of the union government and Supervisor of Ceasefire Supervisory Board (CFSB) C Singson on behalf of the outfit after a meeting yesterday.
Later Singh told reporters said that the government had decided to extend the truce for another year as "years of goodwill cannot be frittered away."