No breakthrough has been achieved in ground-level talks between Mizoram and Assam to resolve the inter-state border dispute in the Barak valley region, where several people were injured in a clash over the issue last week, officials say. Mizoram has hardened its stand on the rift and has said it will get essential supplies from neighbouring countries like Myanmar and Bangladesh if the blockade of trucks in Assam is not eased. Both the states have agreed to a home secretary-level talks on Wednesday.