One man has died and two other people are seriously injured following a "random" series of stabbings in Birmingham city centre.

Five others were also injured in what West Midlands Police have described as a "major incident" overnight - and a murder investigation has been launched.

One unknown male suspect is being sought but no arrests have been made, Chief Superintendent Steve Graham told a news conference on Sunday, adding that the public should remain "alert".

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

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 https://www.youtube.com/channel/UCzG5BnqHO8oNlrPDW9CYJog