1 had already been destroyed by gunfire. Only one boiler remained, but the steam pipes through Boilers 1 and 2 and Turbine Room 2/3 had been damaged and Turbine 1 had lost power. By 04:34, the ship had been severely damaged, but had successfully passed through the firing zone; most of the Norwegian guns could no longer bear on her. The 15 cm guns in the Kopås battery were all standing in open positions with a wide sector of firing, and they were still within range. The battery crews asked for orders, but the commander of the fortress, Birger Eriksen, concluded: "The fortress has served its purpose". After passing the gun batteries, the crew, including the personnel manning the guns, were tasked with fighting the fire. By that time she had taken on a list of 18 degrees, although this was not initially problematic. The fire eventually reached one of the ship's 10.5 cm ammunition magazines between turbine room 1 and turbine room 2/3, which exploded violently. The blast ruptured several bulkheads in the engine rooms and ignited the ship's fuel stores. The battered ship slowly began to capsize and the order to abandon ship was given. Blücher rolled over and sank at 07:30, with significant casualties. Naval historian Erich Gröner states that the number of casualties is unknown, and Henrik Lunde gives a loss of life figure ranging between 600 and 1,000 soldiers and sailors. Jürgen Rohwer meanwhile states that 125 seamen and 195 soldiers died in the sinking. The loss of Blücher and the damage done to Lützow caused the German force to withdraw. The ground troops were landed on the eastern side of the fjord; they proceeded inland and captured the Oscarborg Fortress by 09:00 on 10 April. They then moved on to attack the capital. Airborne troops captured the Fornebu Airport and completed the encirclement of the city, and by 14:00 on 10 April it was in German hands. The delay caused by the temporary withdrawal of Blüchers task force, however, allowed the Norwegian government and royal family to escape the city. Wreck Blücher remains at the bottom of the Drøbak Narrows, at a depth of . The wreck is located south-east of the small Askholmen holms (). The ship's screws were removed in 1953, and there have been several proposals to raise the wreck since 1963, but none have been carried out. When Blücher left