"Parmod alias Lambu, resident of Dattiya in Madhya Pradesh; Dulal alias Vishal, resident of Ghaziabad; Ranjeet Kumar, resident of Narshingpur in Madhya Pradesh and Deepak Kumar of Bihar's Darbhanga district were arrested on October 15 from near Minto bridge on specific inputs," said S B S Tyagi, DCP Crime and Railways.
Police recovered a knife and also blood stained clothes of Pramod and Ranjeet, which they were wearing while committing the crime.
Police had found the body of a unidentified young man, with deep wounds on his body under Sheila bridge at New Delhi railway station on October 14. The body is yet to identified.
During interrogation, the accused said on the intervening night of October 13 and 14, they saw two people near Sheila Bridge with a bag.
"They tried to snatch the bag from the two men at knife- point. But when the victim and his friend resisted, the accused attacked them.
"The friend of the victim ran away from the spot while he fell down near rail track," the official said, adding Parmod and three others inflicted fatal injury with knife on the chest of the deceased and fled from the spot.