Facebook blames technical hitch after social media sites including Instagram and Tinder go down for an hour... but hackers claim THEY were responsible.
- Millions locked out of Facebook and Instagram for around an hour
- Hackers from the online group Lizard Squad have claimed responsibility
- Mark Zuckerberg's social media sites have denied it was a cyber attack
- Blamed the outage on 'a change that affected our configuration systems'
- AIM, Tinder and MySpace were also claimed to have been offline
- Lizard Squad hit Malaysia Airlines, Sony and Xbox in past month