Urban Warfare - the Chechen Experience

During the First Chechen War most of the Chechen fighters had been trained in the Soviet armed forces. They were divided into combat groups consisted of 15 to 20 personnel, subdivided into three or four-man fire teams. A fire team consisted of an antitank gunner, usually armed with Russian made RPG-7s or RPG-18s, a machine gunner and a sniper. A fire team would be supported by ammunition runners and assistant gunners. To destroy Russian armoured vehicles in Grozny, five or six hunter-killer fire teams deploy at ground level, in second and third stories, and in basements. The snipers and machine gunners would pin down the supporting infantry while the antitank gunners would engage the armoured vehicle aiming at the top, rear and sides of vehicles.

[Emphasis added - PH]

http://en.wikipedia.org/wiki/Urban_warfare