Actually he said its quite likely that Finland and Sweden will announce their decisions whether or not to join Nato within days or weeks of each other but that no decision has been reached yet and it still lies in the hands of Parliament, and clearly refused to confirm the rumour of Mid-May. Hesinki Sanomat said that the decision will most likely be made by the end of May.
I think this confusion all stems from Sweden moving forward the date of their security report to early/mid-May instead of late May but I don't understand why it still keeps getting reported wrong!
Now Croatian President has said that Croatia should block the entry of Finland and Sweden to NATO unless Bosnian electoral law is reformed. Its not in his power to block though, but Croatian Parliament but its worrying if they are of the same mind as the President. yle.fi/news/3-12418999