In an escalation following Monday's border gunfight between two police forces that left six Assam policemen dead, Mizoram on Friday said it had filed a case over the incident, naming Chief Minister Himanta Biswa Sarma and other top officials of the neighbouring state in it. The Assam Chief Minster has responded to the FIR filed against him saying that he is happy to join the probe but asked why it is not being handed over to a neutral agency. Mizoram Minister TJ Lalnuntluanga tells NDTV that the state wants to "dissolve this dispute peacefully and without violence". He added: "Both chief ministers - under the leadership of Home Minister Amit Shah - are discussing the dispute. The FIR was a consequence of Assam's illegal actions, there has to be justice as per law."