According to the police, Monika (25), who lived in a building with her husband Satendra on the fourth floor, fell from there last evening.
She was taken to Guru Teg Bahadur hospital where she succumbed to her injuries.
However, the parents of the deceased have alleged Monika's husband used to harass her for dowry and he has killed her. A magisterial inquiry has been ordered in the case, police said.
"A case under 304B (dowry death) and other relevant sections have been registered at Harsh Vihar police station. A magisterial inquiry has been initiated in the case. Investigations are on and we are probing the case from all possible angles," said a senior police official.