The doctor's husband Brijesh,who is a pilot with Air India, has been arrested,said DCP (East) Rishi Pal.
30-year-old Dr Ritu Bangoti, who worked at Anesthesia department of AIIMS, took the extreme step at her flat in Kurmanchal Apartment yesterday evening, they said.
Bangoti used to stay with her in-laws at a apartment.
When she she did not come out of her room for a long time, family members grew suspicious and broke open the door, he said.
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However, the police was informed about the death of the doctor by her brother who had made a PCR call.
The deceased was reportedly having strained relations with her husband.
Neighbours told police that the couple had frequent fights over domestic issues.
The family of the girl also alleged that the couple fought often and the in-laws of the girl used to demand dowry which constantly worried Ritu, said the officer.
"Based on the woman's family statement, recorded in front of the SDM, and basis the facts that came out,we have arrested her husband. A case under sections 498(A) (Husband or relative of husband of a woman subjecting her to cruelty), 304(B)(dowry death), 306 (Abetment of suicide) has been registered against him, " said Singh.
The reason behind the death of the doctor and the nature of substance she allegedly injected to herself was under investigation, he said.
Ritu got married three years back and had a two-year-old daughter.
Husband of the deceased was questioned for several hours and was arrested late evening.
The post mortem report of the deceased is awaited, police said.
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