Media playback is unsupported on your device Media caption Drone footage shows devastation in the French territory of Saint-Martin

European countries are boosting relief efforts in their Caribbean territories devastated by Hurricane Irma, amid criticism over the response.

French President Emmanuel Macron, who is visiting French islands that took the full force of the storm, said a huge "airlift" was bringing more aid.

UK Foreign Minister Boris Johnson is due in the region and the king of the Netherlands is touring Dutch islands.

Irma killed at least 23 people in the three countries' overseas territories.

The victims include 10 dead on the French island of St Barts and on the French part of St Martin - which is shared with the Netherlands.

Image copyright AFP Image caption Emmanuel Macron saw the damage for himself

As he arrived in the region on Tuesday, President Macron said the government had responded with "one of the biggest airlifts since World War Two".

He told reporters that last week's hurricane had been almost unprecedented and that the effort had been hampered by a second hurricane, Jose, in the area days later.

He promised to "shake up all the rules and procedures" to rebuild the islands "as quickly as possible". Later on Tuesday he saw for himself the damage in Saint-Martin.

Critics have accused Mr Macron's government of not doing enough to help hurricane victims and prevent looting on St Barts and Saint-Martin.

The UK government has faced similar complaints following the death of at least nine people people on British territories.

Media playback is unsupported on your device Media caption Praying for recovery in Caribbean

Mr Johnson is due to visit the British Virgin Islands and Anguilla, which have also suffered widespread devastation.

The BBC's Laura Bicker and Paul Blake on Tortola island say many neighbourhoods have been flattened, and their residents can be seen trying to cook and clean amidst the rubble.

About 1,000 UK soldiers are now in the region to deliver aid, and more troops and supplies are due in the coming days, officials say.

More than 100 prisoners escaped during Irma

Interactive See how Road Town, Tortola has been damaged by Hurricane Irma 9 Sep 2017 31 Mar 2015

Meanwhile King Willem-Alexander is visiting Dutch territories, where at least four people were killed. He spent Monday night in Sint Maarten - the Dutch side of St Martin - and is due to travel on to other islands.

"I've seen proper war as well as natural disasters before, but I've never seen anything like this," he told Dutch radio on Tuesday. "Everywhere you look there's devastation, you see the collapse."

Interactive See how Providenciales, Turks and Caicos, has been damaged by Hurricane Irma 10 Sep 2017 1 Jan 2016

Irma struck other Caribbean islands with deadly force, including Cuba, Barbuda, Puerto Rico and the US Virgin Islands.

On the US mainland, it has been linked to 12 deaths since the weekend. The Florida Keys, a low-lying chain of islands, were hit particularly hard by the category-four hurricane.

On Thursday, President Donald Trump is due to visit Florida, where some 60% of homes are still without power.

The storm was downgraded as it moved north into Georgia, the National Hurricane Center (NHC) said in a statement.

Media playback is unsupported on your device Media caption The BBC's correspondents in the region chart Irma's path of destruction

Which areas were hit before Florida?

Irma has been the most powerful Atlantic storm in a decade, and caused widespread destruction on several Caribbean islands: