Technoglitch
Core Member
An employee deactivated the @realdonaldtrump account, it said, clarifying that it had been their last day in the job.
The account was down for 11 minutes and Twitter is now investigating.
Tweets from Mr Trump, who has 41.7 million followers, have frequently caused controversy.
The latest incident has sparked debate about the security of the president's account, given the potential consequences of posts falsely attributed to Mr Trump being published.
Twitter said it was investigating the problem and taking steps to avoid it happening again.
It later said: "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."
Twitter employee 'deactivated' Trump account on last day - BBC News
