US President Donald Trump's @realdonaldtrump Twitter account was 'inadvertently deactivated' due to human error by a Twitter Inc employee on Thursday and was down for 11 minutes before it was restored, the social media company said. 'Earlier today @realdonaldtrump's account was inadvertently deactivated due to human error by a Twitter employee,' the company said in a tweet. 'We are continuing to investigate and are taking steps to prevent this from happening again,' it added.