Facebook's founder Mark Zuckerberg has apologized for the "disruption" caused after its social media services went down for almost six hours - impacting more than 3.5bn users worldwide.

He said sorry after an internal technical issue took Facebook, Messenger, Whatsapp and Instagram offline Monday night.

But it is likely to increase scrutiny of the social media giant's reach.

For hours billions of people found themselves without the social media tools they relied upon to keep in touch with friends and family. Others reportedly found they could not access services which required a Facebook login.

Meanwhile, businesses around the world, which use social media to connect with customers, were faced with the prospect of an unexpected financial hit.

 KAN's Mark Weiss spoke with Professor Nicholas John from the Department of Communication and Journalism and the Program for Internet and Society at Jerusalem's Hebrew University.