The blockade by the Sadar Hills District Demand Committee (SHDDC) since August 1 has led petrol to be sold at Rs 120 per litre in the black market instead of Rs 62, while the prices of vegetables have also gone up, the reports said.
Trucks loaded with essential commodities were stranded at the Mao gate border between Nagaland and Manipur and at Khatkhati in Assam.
Official sources said no hasty decision could be taken because Sadar hills was inhabited by many ethnic tribes although it was a Kuki-majority area.
All opinions would be sought before the area was converted into a district, they said.