The victim, who hails from neighbouring Uttar Pradesh, studied at an institute in Uttarakhand before moving to Delhi for her internship.
Protesters held candlelight march and demonstrations demanding severe and prompt punishment for the accused involved in the case.
Sumangala Mahasangha, a federation of rural women, demanded that fast track courts should be established in every district for prompt delivery of justice to victim.
"If such incidents have to be stopped, immediate action by authorities is required even in minor complaints of women harassment," Ganga Devi Coordinator of Mahasangha said.
A 20-year-old girl was stabbed to death allegedly by a jilted lover in east Delhi this evening, police said.