US takes 'full responsibility' for leaks

The US government takes full responsibility for leaks of the British police investigation into the deadly Manchester bombing, US Secretary of State Rex Tillerson says.

Appearing alongside British foreign secretary Boris Johnson in London on Friday, Tillerson said "all across America, hearts are broken" at news of the attack on people attending a concert by US pop singer Ariana Grande.

British police briefly suspended intelligence sharing with the US on Thursday after private details of their investigation repeatedly appeared in American media.

"We take full responsibility for that and we obviously regret that that happened," Tillerson said.

"With respect to the release of information inappropriately ... certainly we condemn that."

Tillerson said he expected the close security relationship between the US and Britain to withstand the leaks.