Francis Richard D'Mello (52), younger brother of Trajano, was stabbed last night in the stomach near a church in Parra, 10 km away from Panaji.
"The incident happened at around 9.30 pm when he was riding a scooter alone. An unknown man stabbed him and took away the scooter, his mobile and cash," Trajano told PTI.
"I am not attributing any motive right now as he had been operated on and under heavy sedation," Trajano added.
Francis fell unconscious after the attack and later walked to a friend's house in injured condition at around 1.30 am, he said.
Police have registered a case of attempt to murder.