The incident took place in Nangloi at around 12:30 am and the deceased has been identified as Ashish Kumar.
He was walking back to his home when some unidentified men stabbed him to death.
Investigators said the motive behind the murder could be either enmity or an attempted robbery.
They said Kumar's mobile phone, his purse containing Rs 100 cash and a watch were found near his body. He stayed with his family and was unmarried.
In another incident, the body of an unidentified woman's body was found near the Bhalswa Dairy police station this morning.
A passerby saw the body at around 8:00 am and informed police.