Kolkata: Incensed over the arrest of a party worker, Trinamool Congress chief Mamata Banerjee Sunday threatened to lay siege on the city police headquarters on Oct 20.

Speaking at a protest rally against the arrest of Swarup Biswas, allegedly involved in the mob attack on the Charu Market police station in the southern part of the city Oct 5, Banerjee also announced a march to the state secretariat Writers Buildings after Oct 28, the day of the Kali Puja.

"We will lay siege on the city police headquarters Lalbazar on Oct 20," she said.

"Our agitation is against the alliance between the (state's ruling) Communist Party of India-Marxist and the police. We will also agitate in the districts," Banerjee said.

She held the CPI-M responsible for the Oct 5 mob violence and said Biswas was innocent.

Attacking Kolkata Police Commissioner Goutam Mohan Chakraborty, the Trinamool leader said the day her party came to power, officers like him would be punished.

"He is the man who had held me by my hair and threw me out of the Writers Building when I had gone there to seek justice for a rape victim. It is he who is responsible for the police firing on Congress workers on July 21, 1993," Banerjee thundered.

Source : IANS