Angry with his wife for disobeying him by going to her maternal home to celebrate Raksha Bandhan, a man suffocated one of their one-year-old twins with a pillow, police said on Friday.
The accused works as a labourer.
Police spokesman Sube Singh said after his wife Priya returned home, she found her son dead with blood coming out of his nose, ears and mouth.
She informed police and a team reached on spot and took the body of the child in custody, he said.
On the complaint of the mother, a case has been registered against the accused at Old Faridabad police station.
"We have handed over the body of the child to kin after the postmortem and a probe is underway. The accused will be nabbed as earliest possible," Singh added.
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