May said she planned to "make clear" to President Donald Trump at a North Atlantic Treaty Organisation summit in Brussels later Thursday that "intelligence that is shared between our law enforcement agencies must remain secure".
Politico confirmed that May rebuked the leaks and reported that senior United Kingdom official saying, "The prime minister expressed her view that the intelligence sharing relationship with the U.S.is hugely important and valuable but obviously the intelligence needs to be kept secure".
Former White House counterterrorism chief Richard Clarke said he did not blame the British for stopping the flow of information, which might suggest that U.S. confidence in the Trump administration is also waning.
May said she would talk to Trump at a North Atlantic Treaty Organisation summit later on Thursday about the leaks, which included the publication of photographs of the bomb site by the New York Times.
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.
"We are furious. This is completely unacceptable", a British government source said, adding that the matter was being "raised at every relevant level by the British authorities with their USA counterparts".
"When that trust is breached it undermines these relationships, and undermines our investigations and the confidence of victims, witnesses and their families".
Tension between British and US officials began following a series of leaks about the investigation into the bombing, which has led to the U.K.to raise its terrorism threat level to "critical" and has resulted in the arrest of at least two other suspects connected to a terror network. "They haven't. Arrogant, wrong & disrespectful to GM [Greater Manchester]".
"So it is irritating if it gets released from other sources". It also revealed the layout of the blast area and locations of the victims and the bomber's torso.
Abedi was believed to have traveled to Syria and had "proven" links with ISIS, French Interior Minister Gerard Collomb said Wednesday on BFM television, adding that British and French intelligence have information that Abedi had been to Syria.