Russian MOD just confirmed that they've lost one of their MIG29Ks in the Mediterranean. They're their latest carrier borne aircraft and they didn't have many to start with.
http://www.bbc.co.uk/news/world-middle-east-37978463
Not much has been said just yet but it looks like some kind of landing or take-off mishap. The pilot is ok thankfully but I suspect he'll be invited for coffee with no biscuits by the captain.