New Delhi, Dec 16 (ANI): Two years after a 23-year-old girl was gang raped in Delhi, the victim's mother says number of rape cases and complaints lodged by victims has gone up but the change is yet to be seen. The victim, a physiotherapist student, was repeatedly raped and tortured in a moving bus in New Delhi by five men and a teenager and then thrown off the bus bleeding onto the street. She later died of injuries. The day, December 16 marks the second anniversary of the fatal incident. Meanwhile, Delhi gang rape victim's father said the government should take strict action against the culprits and punish them at the earliest.