Google on Monday evening suffered a major outage for nearly an hour after many of its popular services went offline, affecting thousands of users worldwide. The company’s services – YouTube, Gmail, Docs, Calendar and Hangouts – crashed.

Google’s workspace status dashboard showed that services were restored later. A Google spokesperson said the outage was caused due to an internal storage problem that had been resolved.

“Today [Monday], at 3.47AM PT [5.15 pm Indian Standard Time] Google experienced an authentication system outage for approximately 45 minutes due to an internal storage quota issue,” the spokesperson said in a statement. “Services requiring users to log in experienced high error rates during this period. The authentication system issue was resolved at 4:32AM PT. All services are now restored. We apologise to everyone affected, and we will conduct a thorough follow up review to ensure this problem cannot recur in the future.”

Users around the world reported problems with the platforms and took to Twitter to complain that they were unable to watch YouTube videos, access their Google Docs or send emails. According to Downdetector, a website for tracking internet outages, problems with the platforms spiked around 5.45 pm.