At 1.31 AM 670 miles North of the Azores, U-48 sinks British MV Wellfield (8 killed, 19 crew picked up by British tanker British Ardour, another 15 crew picked up by Norwegian MV Heina on June 11). Kriegsmarine places orders for 102 U-boats.
Off the coast of Libya between Misrata and Sirte, British submarine HMS Triumph and WWI-era Italian gunboat Valoroso engage in a duel of deck guns. HMS Triumph sinks Valoroso and 2 tiny Italian steamers Frieda and Trio Frassinetti.
700 miles Southwest of Cape Verde islands, British cruiser HMS London and destroyer HMS Brilliant intercept German tanker Egerland, another supply ship refueling surface raiders and U-boats in the Atlantic. Egerland is scuttled by her crew (all 94 hands rescued by HMS London and HMS Brilliant).