Donald Trump has called Sadiq Khan "incompetent" and said that London will "never have safe streets" after the Metropolitan Police's website was targeted by hackers who posted a series of bizarre tweets from the force's official account.

The President of the United States attacked the Mayor of London in a tweet on Saturday morning which read: "With the incompetent Mayor of London, you will never have safe streets!"

The President’s has quoted a tweet from right-wing commentator Katie Hopkins which said officers have "lost control of London streets" and "lost control of their twitter account too".

The comments were in relation to a series of unauthorised tweets on the Metropolitan Police's official Twitter account.

The force denied that its IT system was hacked, adding that the security issue had only affected its MyNewsDesk account, which it uses to issue news releases.

Late on Friday, a series of tweets were sent out expressing anti-police sentiments and calling for the release of drill rap artist Digga D.