Brian,

I am not sure if your are interested in Navy freindly fires, but I found this on the <combindedfleet.com> web site.

24 October 1944:
The convoy is attacked by two American wolf packs. The submarines’ attacks scatter the convoy. Each Maru is attacked repeatedly, from both sides. During the wolfpacks’ attacks on the convoy, LtCdr George H. Brown’s SNOOK (SS-279) sinks the ARISAN MARU. Sadly, she is carrying 1,781 American PoWs who are lost along with 204 members of the ships’ crew and 125 other Japanese passengers. Only nine PoWs survive

The above informtion was found in the section on Seaplane Tender ships. Thre are many such listing on the web site of US submarines sinking Japanes shpping carrying Allied POWs.