The social media website Twitter was offline for two hours Thursday after its systems unexpectedly failed.
Twitter's vice president for engineering, Mazen Rawashdesh, wrote on the site's blog post that the blackout occurred when both its data system and its backup system failed simultaneously. Rawashdesh apologized for the failure, which he described as a "infrastructural double-whammy."
Thursday's failure was the second in as many months for the popular micro-blogging website. The company blamed last month's outage on a "cascading bug."
Twitter has grown to more than 140 million active users since it was founded in 2006. The site was notoriously unreliable in its early years, and became infamous for its "fail whale" outage icon.
Some information for this report was provided by AP, AFP and Reuters.