Last February, a very big arms shipment of AK-47's and ammunition was found in Helsinki during the cargo transfer. This whole issue became public only now on 9/24. The AY communications wanted to keep to security breach secrect, but in the end didn't succeed. The weapons arrived to Helsinki, Finland on a Finnair flight with a transfer to a Far East AY destination. As an internal department of the the Finnish government, Finnair is responsible for its own security at all of the airports it is operating. Therefore the responsibility of the breach is considered to be only on AY.
So, why was this kept in complete secrecy? For the samreason why the other AY mishaps are kept secret as well. There was a AY MD-11 "smoke in cabin" emergency diversion on Thursday, and there were no press info from AY. This being a MD-11 with a dark history of "smoke-in-the-cabin". Finnair starts to resemble a kind of governmental department, that "never makes mistakes" - and never tells you about those.