Seydlitz was struck in her forecastle at 10:25, by a 13.5 in shell from Lion, but this hit did minor damage. At 10:40, Lion hit Seydlitz with a single 13.5 in (343 mm) shell, which holed the deck and penetrated the rear barbette. The shell itself failed to enter the barbette, but the explosion flashed into the working chamber and detonated the propellant charges inside.[30] By this time, Blücher was severely damaged after having been pounded by heavy shells.