They would have managed to flee after dumping their five-month-old foetus on the roadside, had passersby not intercepted them on time.
On Tuesday morning, a 28-year-old, five-months pregnant woman delivered a baby inside an ambulance while en route Safdarjung Hospital.
A resident of Aali village, near south-east Delhi's Badarpur area, the woman and her husband decided to leave the child on the roadside and return their home when they realised the foetus that had been delivered was dead.
Doctors at a local nursing home, where the couple rushed on Tuesday morning, when the woman developed severe abdominal pain, had referred the couple to Safdarjung Hospital.
However, before she could reach the hospital, she delivered the baby near village Jaitpur.
The couple had reportedly left the foetus near a garbage dump, and were about to board the ambulance when some pedestrians noticed their act and stopped them.
"You can deliver in the fifth month but it is not a viable baby. It is technically a foetus," said a senior doctor from the department of gynaecology at the All India Institute of Medical Sciences (AIIMS).
"We received a call from locals who said a couple was fleeing after dumping a baby on the roadside," said a senior police officer on condition of anonymity.
"We went there and took down the statements of the couple," the officer added.
Police said since the couple did not commit a "crime", they were allowed to leave.
"Ideally, they should have buried the foetus but they said they didn't have any money to do so. We asked them to bury the child and let them go. No case was registered in the matter," the officer added.