Matrosenobergefreiter Alfred Corssen/ Trieste 1943

[addenbrool]

I am seeking information on 2. Kompanie 22. Marinebordflakabteilung.
My father, Alfred Corssen was a Matrosenobergefreiter with this company and with info from the WASt, I know his last posting was to Trieste around 16.07.1943, but he was captured in the Balkans (in British Hands??) on 31.12.1943.
I cannot find any info on why he was captured in the Balkans when his company was in North Italy, or if this company moved over the border into the Balkans.
Any help greatly appreciated.

regards

izi.