The Maoists have been trying hard to regroup in the area, once the hotbed of their activity, ever since their leader Kishenji died in an encounter with joint forces in 2011 and arrest of several top leaders.
The intelligence sources said the extremists would probably try to strike big in the area, which comprises three districts of West Midnapore, Purulia and Bankura, to make their presence felt.
"The Maoists are trying to regroup in Jangalmahal for the last few months but till now they haven't tasted success. There is a high probability that Maoists might try to attack political leaders campaigning in Junglemahal. But we are keeping a close watch," a senior official of the State Intelligence bureau (SIB) told PTI wishing to remain anonymous.
The state government had also appointed Virendra, Director of the Chief Minister's security, as a nodal officer in this regard.
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According to sources, Chief Minister Mamata Banerjee, former chief minister Buddhadeb Bhattacharjee, Trinamool Congress leaders Mukul Roy, Suvendu Adhikary and other leaders of TMC and CPI(M) are on the hit-list of Maoists.
The ultras had in 2008 unsuccessfully made an attempt on the life of Buddhadeb Bhattacharjee.