New Delhi: Even as Left leaders huddle together to assess the reasons for their historic drubbing in the West Bengal assembly polls, the Left Front is up against another challenge: stopping its cadre from changing its political allegiance.

Upset and frustrated with the defeat and fear of possible post poll violence, the Left cadre is in fact distancing itself from the party.

The West Bengal leaders have expressed their concerns before the Polit Bureau. The report from the state unit has been a wakeup call for the party as it has learnt that many party workers are leaving the party and after several others teamed up with Trinamool Congress during the elections.

With the return of central forces after the defeat in assembly elections, the Left is worried about the post poll violence.

According to sources in the Ministry for Home Affairs, the Central forces will return back in a phased manner by the end of this month.

The forces were asked to stay in West Bengal for ten days even after the election in view of post poll violence in the state.

CPI (M) general secretary Prakash Karat had expressed concern on the issue and had appealed the Trinamool Congress to stop violence in the state. The party had leveled charges against the TMC workers of targeting the Left workers after the election.