Kolkata, April 22 -- A day before voting begins in 152 constituencies in the first phase of the West Bengal assembly elections, Union home minister Amit Shah and chief minister Mamata Banerjee on Wednesday kicked off aggressive campaigning for the second phase, targeting the remaining 142 seats across key south Bengal districts, including Kolkata.

Shah discussed strategies for four hours with key Bharatiya Janata Party (BJP) leaders at a Kolkata hotel on Tuesday night, party workers said.

Of the six districts going to polls in the second phase on April 29, four-South 24 Parganas (31 seats), Kolkata (11 seats), East Burdwan (16 seats) and Howrah (18 seats)-have sizeable Muslim populations and no BJP MLAs.

Addressing a rally in the North...