The incidents come close of the heels of two similar killings yesterday in the northeast areas of the national capital.
In New Usmanpur, 23-year-old Rohit Pal was shot in the head and the stomach, the police said, adding that he was accused in a couple of cases, including theft and extortion.
Pal's father works with a power discom in Delhi and the victim had left home to make preparations for a religious function, they said.
In Krishna Nagar, a 41-year-old man was shot dead this evening allegedly by unidentified bike-borne assailants, the police said.
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Jafar, who dealt in scrap and also worked as a property dealer, was shot at outside his shop, they said.
He was rushed to a nearby hospital but could not be saved, the police added.
Eight empty bullet shell casings were found from the spot where Jafar was shot at, they said, adding further probe was underway.
In Pal's case, though locals alleged that his killing was linked to yesterday's incidents and was a fall out of a gang war, the police dismissed claims.