They've been accused of illegal behavior ranging from harassment of diplomats to violent mob attacks. But with State Duma elections just months away, activists from the pro-Kremlin youth group Nashi are teaming up with city police to keep the streets quiet. Critics have accused authorities of turning a blind eye as Nashi's members intimidate political foes. But last week, Nashi began mobilizing brigades of volunteers trained by city police to enforce public order. Some 200 Nashi activists, accompanied by actual police officers, have already begun patrolling the streets, wearing red armbands to show their status as druzhinniki, members of a...