Donald Trump's Twitter account was deactivated by a Twitter employee on their last day at the job, the social media giant has revealed.
Despite an earlier assurance that the deactivation was the result of "human error", Twitter's government and elections team said in a tweet: "Through our investigation we have learned that this was done by a Twitter customer support employee who did this on the employee's last day. We are conducting a full internal review."
Mr Trump's account was down for 11 minutes earlier on Friday (NZ time), and Twitter's Government and Elections team said, in an initial tweet, that it was an accident.
The @realdonaldtrump account is more often by the US President than his official presidential handle.
"Earlier today @realdonaldtrump's account was inadvertently deactivated due to human error by a Twitter employee," the social media site said on its @TwitterGov handle.
"The account was down for 11 minutes, and has since been restored. We are continuing to investigate and are taking steps to prevent this from happening again."
Mr Trump, an avid user of the site, has yet to comment. Twitter doesn't appear to have apologised for the error.
There have been calls for him to be banned from the site, with critics saying his provoking of North Korean leader Kim Jung-un could result in nuclear war.
In August, a former CIA agent started a GoFundMe fundraising campaign to raise money, so she could buy Twitter and kick Mr Trump off it.
"Twitter has ignored growing calls to enforce their own community standards and delete Trump's account," Ms Wilson said.
So far, she has raised US$89,290 of the US$1 billion she says she needs.