that the Luftwaffe was making anti-shipping patrols at that time and had also failed to inform the Luftwaffe that its destroyers would be at sea. Postwar research revealed that one or both ships struck a British minefield laid by the destroyers and . Notes References External links Zerstörer 1934 German Naval History website Type 1934 destroyers Ships built in Kiel 1935 ships Maritime incidents in 1939 Maritime incidents in February 1940 World War II shipwrecks in the North Sea Ships sunk by mines Friendly fire incidents of World War II Warships lost with all hands