Union Minster for Food and Public Distribution Ram Vilas Paswan has criticized opposition parties for indulging in petty politics over death of a dalit student at Hyderabad University recently. He said, Centre has already ordered a judicial probe into this unfortunate incident and Prime Minister during his visit to Lucknow also expressed grief over the tragedy. Mr Paswan was talking to media persons after reaching Allahabad on three-day visit to the city. He also met political leaders and workers of BJP and Lok janshakti Party.