Update from the border
From Ramzan Kadyrov:
“The fighters of the “AKHMAT-RUSSIA” Regiment of the Ministry of Defense of the country, deployed in the Bryansk region and providing protection of the state border between Russia and Ukraine, together with the Special Purpose Center of the FSB, detained four terrorists in the Bryansk region attempting to cross the Russian-Ukrainian border, who directly participated in the shooting of people at Crocus City Hall.
Chechen fighters arrived at the search area for the terrorists at around three o’clock in the morning and immediately began searching the area together with the FSB’s Special Purpose Center and fighters from the Leningrad Military District of the Russian Armed Forces.
With the task of capturing the killers alive, they successfully accomplished it despite the risks. None of the law enforcement officers were harmed during the special operation.
Putin uses Chechen troops as "barrier troops".
Barrier troops, blocking units, or anti-retreat forces are military units that are located in the rear or on the front line (behind the main forces) to maintain military discipline, prevent the flight of servicemen from the battlefield, capture spies, saboteurs and deserters, and return troops who flee from the battlefield or lag behind their units.