President rebukes NATO allies for not paying their fair share of military costs.

LONDON — President Donald Trump on Thursday denounced U.S. leaks about Britain’s investigation of the Manchester terrorist bombing as “deeply troubling” and asked the U.S. Justice Department and other agencies to launch a full investigation.

Leaks from the ongoing probe — including the publication of crime-scene photos in the New York Times and the naming of the suspected bomber by U.S. broadcasters — have provoked ire from British officials.

In response to the disclosures, British police investigating the Manchester attack took the highly unusual step of withholding information from U.S. agencies, whom they believe are responsible for the leaks.

But by late Thursday evening, police said they had resumed intelligence sharing following “fresh assurances.”

British authorities have not said that the leaks have hurt the investigation into worst terrorist attack in Britain in more than a decade — 22 people died and 116 were injured Monday evening following a bomb explosion at the conclusion of a pop concert in Manchester.

But some commentators have suggested that publishing the name of the suspected bomber could have compromised the investigation. Withholding of the name for longer could have allowed authorities to track down people who may have since gone to ground, they said.

There is also a marked difference in the relationship between the press and the secret intelligence services in the United States and Britain. Here, the culture is more closed, the spy agencies more secretive — it wasn’t until 1986 that the government even officially recognized the existence of MI6. So when leaks like this occur, it’s a big deal.

May said Thursday morning she would “make clear” to Trump during the NATO summit that “intelligence that is shared between our law enforcement agencies must remain secure.”

May later had a tête-àtête with Trump while they were waiting for a photograph to be taken. Her spokesman said she told Trump that U.S.-British information sharing was “hugely important” but should be safeguarded.

John Lloyd, a media commentator, said the outrage should also be viewed in the context of Britain’s upcoming election. “The election may account for some of the grandstanding,” he said.

Without an election in the offing — Britons go to the polls June 8 — some politicians may have voiced their frustration “behind closed doors,” he said.

In a statement issued amid meetings in Brussels with leaders of NATO member nations, Trump responded to British indignation by vowing to “get to the bottom of this.”

“The leaks of sensitive information pose a grave threat to our national security. I am asking the Department of Justice and other relevant agencies to launch a complete review of this matter, and if appropriate, the culprit should be prosecuted to the fullest extent of the law,” he said.