I found this in Goteborgs Posten this morning.
http://www.gp.se/gp/jsp/Crosslink.jsp?d=119&a=423412
I was around in those days and the episode was quite frightening especially after the Catalina was shot down a few days later on, was it, June 16th? I have still a copy of Expressen (25 ore for a copy in those days!) from that day as I knew a couple of the members of the crew of that aircraft quite well.