He also made it clear that his party does not support the IPFT's demand for a separate state for the tribal population and talks have focused on improving socio-economic conditions of tribals.
"Talks have been positive. Decision on any alliance will be taken by the central leadership," he told PTI.
BJP sources said a delegation of tribal leaders had met Prime Minister Narendra Modi and Home Minister Rajnath Singh, and the home ministry has set up a committee to work out a package to help the state's tribal region.
The incumbent Chief Minister Manik Sarkar has been at the helm for 20 years and is seen as a formidable leader with a clean image.
He has led the CPI(M) to facile wins in the last several polls but the BJP, which was never a strong contender for power in earlier elections, has emerged as his strongest challenger this time round with several MLAs from other parties joining it.
Polls to the 60-member assembly are expected next month.
The BJP has built its campaign on alleged lack of development in the state and also promised to implement seventh pay commission.
Central government schemes have also benefited a big share of population in the small state, BJP leaders have asserted.
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