Several BJP leaders in West Bengal, including Leader of the Opposition Suvendu Adhikari, were detained by the 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. The BJP claims their leaders and workers were water cannoned and lathi-charged. Trinamool, on the other hand, claims the BJP was allowed to march peacefully but deliberately instigated the violence.