September, developed into a widespread 'massacre' of Muslims around October, organised by the Hindu Dogra troops of the State and perpetrated by the local Hindus, including members of the Rashtriya Swayamsevak Sangh, and the Hindus and Sikhs displaced from the neighbouring areas of West Pakistan. The Maharaja himself was implicated in some instances. A large number of Muslims were killed. Others fled to West Pakistan, some of whom made their way to the western districts of Poonch and Mirpur, which were undergoing rebellion. Many of these Muslims believed that the Maharaja ordered the killings in Jammu which instigated the Muslims in West Pakistan to join the uprising in Poonch and help in the formation of the Azad Kashmir government. The rebel forces in the western districts of Jammu were organised under the leadership of Sardar Ibrahim, a Muslim Conference leader. They took control of most of the western parts of the State by 22 October. On 24 October, they formed a provisional Azad Kashmir (free Kashmir) government based in Palandri. Accession Justice Mehr Chand Mahajan, the Maharaja's nominee for his next prime minister, visited Nehru and Patel in Delhi on 19 September 1947, requesting essential supplies which had been blockaded by Pakistan since the beginning of September. He communicated the Maharaja's willingness to accede to India. Nehru, however, demanded that the jailed political leader, Sheikh Abdullah, be released from prison and involved in the state government. Only then would he allow the state to accede. The Maharaja released Sheikh Abdullah on 29 September. The Maharaja's troops could not withstand the tribal militia attack in September and October 1947; they were heavily outnumbered and outgunned by the tribal militias, and were also facing internal rebellions from Muslim troops. The Maharaja made an urgent plea to Delhi for military assistance. Upon the Governor General Lord Mountbatten's insistence, India required the Maharaja to accede before it could send troops. Accordingly, the Maharaja signed an instrument of accession on 26 October 1947, which was accepted by the Governor General the next day. While the Government of India accepted the accession, it added the proviso that it would be submitted to a "reference to the people" after the state is cleared of the invaders, since "only the people, not the Maharaja, could decide where Kashmiris wanted to live."; it was a provisional accession. The largest political party, National Conference, headed by Sheikh Abdullah, endorsed the