Kolkata Aug 16 (Reporter) West Bengal Chief Minister Mamata Banerjee on Friday accused the BJP and CPI(M) of "masterminding" the midnight violence at R G Kar Hospital here, even as students of premier colleges hit the streets protesting the alleged rape and murder of a young medic. Addressing a rally at central Kolkata's Dorina crossing, Banerjee alleged the CPI(M) and BJP orchestrated the vandalism at the RG Kar Medical College and Hospital to "tamper with the evidence" on the eve of Independence Day. Meanwhile, the current and former students of the St Xavier College here took out a candlelight procession from the campus seeking justice for the woman post-graduate trainee doctor brutalised and killed within the R G Kar Hospital premises on August 9. The students and faculty of the Presidency University took out a ]protest march with placards reading the "city of joy" has turned into "city of bhoy" ( fear)...////...