BY A STAFF REPORTER: Bengal CM Mamata Banerjee writes to all Oppn leaders & CM's. In letter she expressing concern over BJP's direct attacks on democracy. She also said that, 'I urge that all of us come together for a meeting to deliberate on the way forward at a place as per everyone's convenience & suitability. Central agencies such as the ED, CBI, Central vigilance, Income tax dept are beig used to target, harass and corner political opponents across the country for vendetta.'