Moscow police officers discovered a murder of 28-year-old ethnic Armenian, whose body was found a day before in one of offices at New Arbat.
A 33-year-old Armenian citizen, familiar with the victim, was detained on suspicion of murder, Rosbalt reported.
As was proved in the course of investigation, the two men started a fight in which the victim was twice stabbed with a knife.
The victim, 28-old man who worked as a head foreman, died of knife wounds.