The Don vs. Khan battle entered another round on Saturday.

President Trump mocked London’s Mayor Sadiq Khan after a Twitter account for the city’s police department was hacked.

“With the incompetent Mayor of London, you will never have safe streets!” the commander in chief tweeted after the incident.

The comment came in a retweet of controversial British columnist Katie Hopkins, who had written, “Officers says they have lost control of London streets. Apparently they lost control of their twitter account too.”

In the past, Trump has attacked Khan’s approach to the June 2017 terrorist attack in London.

“At least 7 dead and 48 wounded in terror attack,” Trump tweeted at the time, “and Mayor of London says there is ‘no reason to be alarmed!’ ”