A retired firefighter has told Sky News that basement fires are among the most difficult to tackle. A basement with a single exit, as appears to be the case at Le Constellation bar in Crans-Montana, should only hold around 60 people, Steve Dudeney said. But with a couple of hundred people said to be partying there on New Year's Eve, he questions whether there were enough, or suitable, exits in place. Live updates: https://news.sky.com/story/switzerland-latest-several-killed-after-explosion-at-swiss-ski-resort-bar-reports-13489063 #switzerland #cransmontana #skynews SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews 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 Sky News Daily podcast is available for free here: https://podfollow.com/skynewsdaily/ 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 To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales