Alex, the island had been invaded by French forces earlier that month through this port, there is no doubt the attacking forces were luftwaffe.
A vessel sank was the LST79, there are plenty of online resources which should leave no doubt that it was a Luftwaffe attack.
en.m.wikipedia.org/wiki/1_Army_Corps_(France)
http://books.google.ie/books?id=Kk0T...Bw&redir_esc=y