Social media giant Facebook apologised this evening after its second outage in a week and third in a month.

Millions of users were greeted with a message reading "sorry something went wrong" just after 9pm.

The site, which claims to have 1.23 billion monthly users, displayed an error message to users who were trying to log on.  

Users also could not access Facebook from mobile phones.

The service started being restored by 9.30pm.

"We are currently restoring Facebook services that people had trouble accessing earlier today due to a configuration," Facebook spokesman Jay Nancarrow told the media.

"We are working to bring things back to normal for everyone." 

Messenger services were working during the outage.

This was the second time in a week that the world's biggest social media server had gone down. Facebook suffered a similar outage on Thursday when it was down for some 10 minutes in North America, Europe, Australia and India.

Within minutes of the service being restored, memes and jokes were making the rounds reflecting the infatuation of many to share photos on the site.