Kolkata, Sep 2 (Reporter) Kolkata’s Lalbazar on Monday turned into a veritable fortress as the police erected pickets on roads leading to the Kolkata Police headquarters to foil a proposed protest by the striking government medics. The protesting doctors threatened to lay siege to the police headquarters over their demands, including resignation of City Police Commissioner Vinet Goyal, accusing him of tampering with the evidence in the lady medic murder and failure to prevent the subsequent vandalism at a protest site in RG Kar hospital. Apart from erecting iron guard walls, most of them nine feet in height, the law enforcers also kept water cannon vehicles on standby and deployed riot police near the roadblocks. Similar protective walls were erected on August 27 around the Nabanna, the secretariat of the West Bengal government, in Howrah during a massive student protest march, sources added. On Monday, the striking doctors started assembling at the College Street from where they proposed to start the march towards the police headquarters at Lalbazar. A report from New Delhi said the Supreme Court on Tuesday upheld a Calcutta High Court order of Saturday granting interim bail to one of the conveners of the West Bengal Chhatra Samaj, which sponsored the Nabanna Avijan on August 27. The West Bengal government had moved apex court to challenge the High Court order granting interim bail to the student leader. A report from Cooch Behar in north Bengal said that clashes took place between West Bengal Police and BJP supporters, headed by former Union Minister Nishit Pramanik, who proposed to lay siege to the district magistrate’s office demanding justice for the medic murder. Sources said that the police used water cannons and lathicharge on the protesting BJP supporters. The BJP also started a sit-in demonstration in front of the district magistrate office at Alipur in the city after being stopped from going to the DM office. The BJP rally was led by former MP Locket Chatterjee and other senior women leaders...////...