The President of Finland, Sauli Niinistö has told a news conference in Helsinki that Russia's invasion of Ukraine "changed the picture" on the country's security. In a message to Russia he said, "you caused this - look at the mirror". Mr Niinistö was speaking after he signed a joined security pact with Boris Johnson. For the latest developments: https://qrcode.skynews.com/skynews/ukraineblog SUBSCRIBE to our YouTube channel for more videos: null Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews Follow us on TikTok: https://www.tiktok.com/@skynews For more content go to http://news.sky.com/ and download our apps: Apple: https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí null Sky News videos are also available in German here/Hier können Sie außerdem Sky News-Videos auf Deutsch finden: https://www.youtube.com/channel/UCHYg31l2xrF-Bj859nsOfnA To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales