In a shocking incident a young model locked up her grandparents in a room and set the house on fire and ran away. The girl is currently missing. The grandparents were rescued by neighbours. The incident took place on March 16 in Mysuru.The girl is allegedly addicted to drugs and when the grandparents tried to ask her to stop her habits, she threatened to beat them up and locked them. The grandparents have not filed a police complaint against her.