UPDATE | UK police find 'significant' evidence; May slams US on leaks

MANCHESTER, England (AP) — Home searches across Manchester and beyond have uncovered important items in a fast-moving investigation into the concert bombing that left 22 people dead, Manchester's police chief said today as a diplomatic spat escalated over U.S. leaks about the investigation to the media.

Greater Manchester Police Chief Constable Ian Hopkins told reporters the eight suspects detained so far are "significant" arrests, and "initial searches of premises have revealed items that we believe are very important to the investigation."

He did not elaborate, but those arrests around the northwestern English city include Ismail Abedi, the brother of 22-year-old Manchester Arena bomber Salman Abedi. The bomber's father Ramadan Abedi and another brother Hashim have been detained in Libya.

As police raced to uncover the network that may have helped Abedi attack an Ariana Grande concert on Monday night, furious British officials blamed U.S. authorities today for leaking details of the investigation to the media.

One British official told The Associated Press that police in Manchester have stopped sharing information about their bombing investigation with the U.S. until they get a guarantee there will be no more leaks to the media. The official spoke on condition of anonymity because he was not authorized to speak publicly.

British Prime Minister Theresa May said she would discuss the leaks with President Donald Trump at a NATO summit. Upon her arrival in Brussels, May said the U.S.-British defense and security partnership is built on trust.

But she said "part of that trust is knowing that intelligence can be shared confidently."