London’s Mayor Sadiq Khan and US President Donald Trump have had yet another bitter war of words following the latest deadly terror attack.

Mr Khan said he had “more important things to do” than correct Mr Trump’s “ill-informed tweet” in which the President argued Islamic terrorism “will only get worse” unless leaders “stop being politically correct”.

“At least 7 dead and 48 wounded in terror attack and Mayor of London says there is ‘no reason to be alarmed!’,” Mr Trump wrote on Twitter.

Mr Khan said Mr Trump was deliberately taking his statement out of context, after he urged Londoners not to be alarmed by an increased police presence.

A spokesperson for the Mayor said Mr Khan was too busy to respond to Mr Trump.

“He has more important things to do than respond to Donald Trump’s ill-informed tweet that deliberately takes out of context his remarks urging Londoners not to be alarmed when they saw more police – including armed officers – on the streets,” the spokesperson said.

We must stop being politically correct and get down to the business of security for our people. If we don't get smart it will only get worse

— Donald J. Trump (@realDonaldTrump) June 4, 2017

At least 7 dead and 48 wounded in terror attack and Mayor of London says there is "no reason to be alarmed!"

— Donald J. Trump (@realDonaldTrump) June 4, 2017

In an earlier television interview, Mr Khan said increased police presence was needed in the aftermath of the attack to ensure “we are as safe as we possibly can be”.

“You will see an increased police presence today, including armed officers and uniformed officers. There is no reason to be alarmed by this.”

Mr Khan and the Trump family clashed, too, after the Westminster Bridge attack in March, with the Trumps accusing Mr Khan of softness and political correctness after the attack.

You’re an ‘alarmist blowhard’: Rowling to Trump

British author JK Rowling also slapped down Mr Trump for his criticism of the London Mayor.

“It’s called ‘leadership’, Donald. The terrorists were dead 8 minutes after police got the call. If we need an alarmist blowhard, we’ll call,” Ms Rowling wrote on Twitter.

It's called 'leadership', Donald. The terrorists were dead 8 minutes after police got the call. If we need an alarmist blowhard, we'll call. https://t.co/NUiy9j4fBt

— J.K. Rowling (@jk_rowling) June 4, 2017

We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!

— Donald J. Trump (@realDonaldTrump) June 3, 2017

She added: “The thugs who mowed down innocent people would love to think of the UK ‘reeling’ but it isn’t. Don’t confuse grief with lack of courage.”

Mr Trump also used the attack to push for his stymied travel ban as a “needed extra level of safety”. He also offered Britain his support.

Three attackers killed at least seven people by ramming a van into pedestrians on London Bridge and stabbing revellers in nearby bars.

Police shot dead the male assailants in the Borough Market area within eight minutes of receiving the first emergency call.

The Islamic State has since claimed responsibility for the attack.

Mr Khan said London Bridge Underground and National Rail stations would reopen on Monday.

He had earlier said he was “appalled and furious” and condemned the “barbaric cowards … in the strongest possible terms”.

“There is absolutely no justification for their evil and unforgivable actions.”

“My thoughts are with the family and friends of the victims and everyone caught up in this horrific attack.”

This was not the first time Mr Khan had gone head to head with a member of the Trump family.

Do you notice we are not having a gun debate right now? That's because they used knives and a truck!

— Donald J. Trump (@realDonaldTrump) June 4, 2017

Whatever the United States can do to help out in London and the U. K., we will be there – WE ARE WITH YOU. GOD BLESS!

— Donald J. Trump (@realDonaldTrump) June 3, 2017