 The day after the explosion , Organisation Todt workers were assigned to clean up the debris and wreckage . On 30 March at 16 : 30 the torpedoes from MTB 74 , which were on a delayed fuse setting , exploded at the old entrance into the basin . This raised alarms among the Germans . The Organisation Todt workers ran away from the dock area . German guards , <unk> their <unk> uniforms for British uniforms , opened fire , killing some of them . The Germans also thought that some Commandos were still hiding in the town , and made a street by street search , during which some <unk> were also killed . 
