Narendra Singh Tomar, a veterinary doctor accused in the high-profile Madhya Pradesh Professional Examination Board or MPPEB scam, died under mysterious circumstances on Saturday night. Another accused in the scam, Dr Rajendra Arya, out on bail, also died in a hospital in Gwalior on Sunday. He was suffering from a liver infection. 23 others linked to the scandal, also known as Vyapam scam, have died under mysterious circumstances so far.