Hallo Urs

I don't Know the reason for the explosion but i can provide you with some ships involved:

From the Nord- Reederei GmbH., Hamburg:

Ship Nr. 10 / damaged
Ship Nr. 12 / damaged
Ship Nr. 13 / damaged
Ship Nr. 106 / damaged
Ship Nr. 504 / damaged
Ship Nr. 523 / damaged
Ship Nr. 525 / damaged
Ship Nr. 527 / damaged

and

german O-06-Pmot / Ulmbrüder II (334 dwt) sunk laiter raised

german Selma (1414 BRT) sunk

norwegian tankship Utvaer (945 BRT) damaged

german tankship Inga Essberger (1827 BRT) damaged

german (ex. norwegian passenger Meteor) hospital ship Meteor II (3717 BRT) damaged

Best regards
Axel