French torpedo boat hit a mine and was probably lost according to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 18 August 1917

An item referred to a tiding of the navy attache at Madrid, Spain dated 15 August reporting that according to the crew of pilot boats at Marseille, France on 4 August south of Chateau d’If a French torpedo boat hit a mine and probably sunk (U 72).

Source

Bundesarchiv RM-40-622