Her father sought security for the family apprehending threat to their lives and claimed they were under political pressure to "hush up" the matter and go for a compromise.
Meanwhile, under fire over the incident, Deputy Chief Minister Sukhbir Singh Badal this evening ordered all buses of Orbit Aviation, which he co-owns, off the road.
"We are not going to cremate our daughter whose body has been kept in a mortuary until and unless justice is done to us by initiating criminal case against the owner of the bus," victim's father Sukhdev Singh said.
"We, including my son, should be given security cover because we are feeling threatened. A written assurance should be given undertaking responsibility in the event of any harm to any of our family members," he told journalists.
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Amid mounting protests by opposition parties including Congress and AAP, Sukhbir Badal, while ordering all his company's buses off the road, also directed that the operating staff be sent for an "orientation course".