Outages took down a number of Internet services Monday night, including Facebook, Instagram, HipChat, and possibly others. Hacker group The Lizard Squad took credit but Facebook denied there was any hacking attempt. Web sites which track Web outages, such as Outage Analyzer, noted Facebook’s outage at 10:24 PM on Monday night, and reported numerous other outages affecting the company’s servers.

Facebook’s Instagram was also unreachable, and users complained online that the dating app, Tinder, was also not working. Atlassian’s HipChat service also failed to connect.

The outages lasted for about an hour.

Hacker group The Lizard Squad took credit for the outage, however, claiming it had taken down several services.

Facebook denied in a statement that any outside party was responsible.

"This was not the result of a third-party attack but instead occurred after we introduced a change that affected our configuration systems," the Facebook statement said. "Both services are back to 100 percent for everyone."