"Nothing short of death sentence in cases of rape of children and cases involving brutality and barbarity will help," Swaraj, who met the victim at the AIIMS, said.
"I went to AIIMS to see the child. Doctors are doing their best. Let us all pray...I think we should hang these criminals and save our children," she wrote on Twitter.
Swaraj said the new anti-rape law should include two more provisions for providing death penalty to those who rape children and those who commit heinous and brutal crimes.
The Leader of Opposition in Lok Sabha also asked Home Minister Sushilkumar Shinde to convene a meeting of representatives of all political parties to provide for death sentence to perpetrators of such brutal crimes.
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"Home Minister should convene a meeting of representatives of all political parties to provide for death sentence in cases of rape of children and cases involving brutality and barbarity as in the present case," she said, adding that Prime Minister Manmohan Singh should also be present at the meeting.
"I had thought barbarity in Damini case was an aberration. Delhi child rape case has shown that perversity and sadism is common to these criminals," Swaraj said.