New Delhi, July 21 -- The All India Trinamool Congress (TMC) will hold its annual Martyrs' Day rally in Kolkata today, July 21, with party supremo and West Bengal Chief Minister Mamata Banerjee expected to hit out at the BJP over the alleged harassment of Bengali-speaking migrant workers in the saffron party-ruled states.

Lakhs of TMC supporters from across the state have already arrived in the city for the rally. Besides Banerjee, TMC national general secretary Abhishek Banerjee will be the key speaker at the rally.

The programme, held every year to commemorate the killing of 13 Youth Congress workers in a 1993 police firing, has grown into the party's largest political event. This year's rally holds significance as it is being seen as...