Union minister Subhas Sarkar has criticised the Mamata Banerjee government over heavy police action during a protest in Kolkata today. "This is the usual practice of Trinamool's politics. In BJP states, we allow democratic protests. They never prevent protests," Mr Sarkar, the Union Minister of State for Education, told NDTV. On being asked about Congress leaders Rahul Gandhi and Priyanka Gandhi Vadra stopped from protesting in a BJP-ruled state, Mr Sarkar replied, "You should compare apple to apple. This is a different situation." Several BJP leaders, including Leader of the Opposition Suvendu Adhikari, were detained by the Kolkata Police today when they were marching to state secretariat 'Nabanna' in Kolkata, as part of a huge protest over alleged corruption by the ruling Trinamool Congress government.