The blockade has been imposed by United Naga Council to protest the state government's decision to form seven new districts. The UNC claims the districts in the Naga-dominated hill areas will affect land holdings of Naga tribes settled in these areas.
The blockade which has surpassed 50 days now has crippled normal life in Manipur with scarcity of essential goods being a major concern apart form violence.
In a letter to Modi, Mary Kom, an Olympic bronze-medallist, urged him to try and resolve the issue at the earliest.
"It is to bring to your notice that the state of Manipur is going through the toughest of time with unrest situation.
The whole section of communities, both in hills and valley, residing in Manipur are suffering due to the economic blockade and counter-blockade and have now turned into ugly consequences of greater destruction and if not intervened in time, there are possibilities of untoward happenings and the people are so insecure," she wrote.
"Irrespective of the causes and reasons, I strongly recommend and request you to consider this prevailing situation in Manipur a serious matter and kindly intervene at the earliest for peaceful solution and the state be brought back to normalcy. This act will remain a great achievement and the people will remain in owe towards your kind intervention," she said.