A man was beaten Friday night in the Bloomingdale section of the District by a group of masked assailants, authorities said.

The attack has raised questions as to whether it was one of the so-called knockout incidents in which the assailants attempt to fell a victim with an unexpected blow, often delivered from behind.

The attack occurred near First and W Streets NW after the victim had left a gathering at a row house. The assailants punched the victim in the face, then ran.

Police officials in the Fifth District said that they would investigate thoroughly. However, they said that as of Saturday they have not confirmed that the incident was a knockout attack. Police said such attacks are not characteristic of t he area.