A 22-year-old man has been arrested by the police for allegedly pushing to death his colleague from the terrace of a four-storey structure in suburban Kurla following an argument, an official said.

According to the official, the deceased, identified as Aman alias Bittu Aftab Sheikh (19), was pushed off the terrace by the accused, Sultan Khan (22), in the Qureshi Nagar locality of Kurla on Thursday.