The ruling Trinamool Congress on Tuesday wins the Gosaba Assembly constituency, and is headed for a clean sweep as it took massive irreversible leads in all the other bypoll seats.
The bypolls were held last Saturday.
The counting of votes to Khardah, Santipur, Gosaba and Dinhata which began at 8 am amid tight security showed that the TMC was set for a landslide wins in two constituencies including Dinhata which had returned BJP's Minister of State for Home Nisith Pramanik in elections held earlier this year, where the leads were over 1.4 lakh and respectable wins in two others.
Although the EC is yet to announce the final results, West Bengal Chief Minister and TMC supremo Mamata Banerjee quickly congratulated her party candidates for the "victory".
"My heartiest congratulations to all the four winning candidates! This victory is people's victory, as it shows how Bengal will always choose development and unity over propaganda and hate politics. With people's blessings, we promise to continue taking Bengal to greater heights!" she said in a twitter post.
In Dinhata in Coochbehar district, TMC's Udayan Guha was way ahead of his nearest rival, BJP's Ashok Mandal, by a massive margin of 1,40,326 votes.