(Reuters) British Prime Minister Theresa May said on Thursday she would tell U.S. President Donald Trump that intelligence shared between their two countries had to remain secure after leaks to U.S. media about the Manchester attack.
British police stopped sharing information about the suicide bombing with the United States, a British counter-terrorism source told Reuters after police chiefs said the leaks to media risked hindering their investigation.
Police are holding eight people in custody in connection with the attack, which killed 22 people, and Manchester's Chief Constable Ian Hopkins said the arrests were significant.
"I want to reassure people that the arrests that we have made are significant, and initial searches of premises have revealed items that we believe are very important to the investigation," he told reporters.
The official threat level in Britain was raised after the Manchester attack to "critical", its highest level, meaning a further attack could be imminent. Troops have been deployed to free up police officers for patrols and investigations.