Battle of Cape Burnas

The Battle of Cape Burnas was a naval engagement between the Soviet and Romanian navies near the Burnas Lagoon in October 1942.
On 1 October 1942, the Soviet M-class submarine "M-118" attacked and sank the German transport ship "Salzburg", which was carrying on board 2,000 Soviet prisoners of war. After attacking, the submarine was located by a German BV 138C flying boat, and the Romanian gunboats "Sublocotenent Ghiculescu" and "Stihi Eugen" were sent to the scene. The two Romanian warships attacked the Soviet submarine with depth-charges, sinking her with all hands.
Alternative versions.
Recent surveys in the area failed to find the wreck in the alleged sinking location and it has been raised the alternative version that "M-118" was lost due German seaplane attack or a Romanian field from barrage "S-30".
At the same time, one literary source attests that two Soviet submarines were confirmed to have been sunk by Romanian surface units. There are several Soviet submarines claimed to have been sunk by Romanian surface warships, but the two most valid claims are "M-118" and "Shch-206", sunk on 9 July 1941.