Facebook has blamed “server configuration change” for the outage that affected its application around the world on Wednesday.
The outage lasted for more than 12 hours on Wednesday, which affected North America and Europe the most.
On Thursday, the Tech giant released a statement issuing an apology and explanation.
“Yesterday, as a result of a server configuration change, many people had trouble accessing our apps and services,” a Facebook tweet said.
“We’ve now resolved the issues and our systems are recovering. We’re very sorry for the inconvenience and appreciate everyone’s patience.”
The outage affected roughly 2.7 billion people worldwide, and affected its core networks – Instagram, Facebook and messaging applications.
In November, a Facebook outage was attributed to a server problem, and a September disruption was said to be the result of “networking issues.”
Bloomberg also reported that Facebook is considering refunding money top advertisers whose messages could not be delivered.
The New York Times had earlier reported that US prosecutors had launched a criminal investigation into Facebook for sharing users’ information to third parties without the knowledge of the users.
A grand jury in New York is believed to have subpoenaed information from two smartphone makers, asking for information about such arrangement.
Facebook also faces other investigations about sharing user data.