Assam Chief Minister Himant Biswa Sarma on Friday lashed out at his West Bengal counterpart Mamata Banerjee, asking her to "stop indulging in politics" over the rape and murder of a woman doctor at R G Kar Medical College and Hospital in Kolkata. Sarma's assertion while speaking to reporters here on the sidelines of a BJP meeting came in response to Banerjee accusing the opposition parties in West Bengal of being behind vandalism at the hospital in north Kolkata on the intervening night of Wednesday and Thursday. "The incident that happened in Kolkata is very sad and the people of West Bengal and the entire country are in a state of shock. Mamata didi should avoid doing politics over the matter. She should focus on finding out who was behind the incident and fixing the accountability," Sarma said while replying to a query on Banerjee's allegations. "If you (Mamata Banerjee) do politics even after such a tragic incident, I believe this is very wrong. In such a time accusing others is