Story highlights "We obviously regret that that happened," says US Secretary of State of leaks

Rex Tillerson is the United States' most senior diplomat

London (CNN) US Secretary of State Rex Tillerson said the US government took full responsibility for intelligence leaks from the investigation into Monday's deadly terror attack in Manchester, as he met Friday with his UK counterpart Boris Johnson.

Tillerson's first official visit to the United Kingdom comes after senior UK government officials lambasted the United States over the leaks and temporarily suspended intelligence sharing on the investigation.

UK Foreign Secretary Boris Johnson (R) greets US Secretary of State Rex Tillerson in London.

But Tillerson, addressing reporters alongside Johnson after signing a book of condolence for victims of the Manchester attack, said the spat would not impact on the two countries' longstanding friendship.

US President Donald Trump "has been very strong in his condemnation," Tillerson said, and has called for the investigation and prosecution of those responsible for leaking the information.

"We take full responsibility for that and we obviously regret that that happened," he said. "In terms of how to fix the relationship between the United States and Great Britain, the special relationship that exists between our two countries will certainly withstand this particular unfortunate event."

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