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The alleged leaks from an investigation into the Manchester terror attack are undermining the probe, British police said on Thursday as the BBC reported that police had stopped sharing information with the United States.
A spokesman for Britain's anti-terror police said in a statement that British investigators relied on trust with security partners around the world.
"These relationships enable us to collaborate and share privileged and sensitive information that allows us to defeat terrorism and protect the public at home and abroad," the spokesman said.
"When that trust is breached it undermines these relationships, our investigations and the confidence of victims, witnesses and their families," he said.
"This damage is even greater when it involves unauthorised disclosure of potential evidence in the middle of a major counter terrorism investigation".
Contacted by AFP, Greater Manchester Police declined to comment on the BBC report.
The New York Times published yesterday what appeared to be police photographs showing fragments from the bomb and a backpack used to conceal it.