Attempts by the Red Army to break through the German perimeter early in February were fought back, with the Fourth Army receiving heavy artillery support from the German cruisers "Admiral Scheer" and "Lützow" firing across the Haff from the Baltic sea into the Frauenburg end of the pocket. Frauenburg itself was taken on February 9, in fierce fighting involving elements of the 170th Infantry Division. During one Soviet attack the 3rd Belorussian Front's commander, General Ivan Chernyakhovsky, was killed by a shell splinter near Mehlsack. His successor, Marshal Aleksandr Vasilevsky, having effectively contained the remains of the Army Group, concentrated on assembling reinforcements over the next month. Under the supervision of Major-General Karl Henke, the Germans continued to attempt resupply and evacuations of wounded along the Frische Nehrung, often at night to avoid air attack. A long, narrow corridor through to the besieged garrison of Königsberg was also maintained against the attacks of the 11th Guards Army through a joint effort by the garrison, and by the Großdeutschland Panzergrenadier Division.