Various aspects of the US State security apparatus have been leaking so egregiously that the Manchester police has stopped sharing data with US agencies over the concert bombing:

Police investigating the Manchester Arena bomb attack have stopped sharing information with the US after leaks to the media.

UK officials were outraged when photos appearing to show debris from the attack appeared in the New York Times.

It came after the name of bomber Salman Abedi was leaked to US media just hours after the attack, which left 22 dead.

Theresa May said she would tell Donald Trump at a Nato meeting that shared intelligence “must remain secure”.

………

Greater Manchester Police hope to resume normal intelligence relationships – a two-way flow of information – soon but is currently “furious”, the BBC understands.

Its chief constable Ian Hopkins said the recent leak had caused “much distress for families that are already suffering terribly with their loss.”.

The force – which is leading the investigation on the ground – gives its information to National Counter-Terrorism, which then shares it across government and – because of the Five Eyes intelligence sharing agreement – with the US, Australia, Canada and New Zealand.

………

BBC security correspondent Gordon Corera says UK officials believe that US law enforcement rather than the White House is the likely culprit for the leaks.

The leaks do sound a lot like the FBI: The organization has a long tradition of grandstanding with the press.

And I would note that it has happened before, and it only seems when it’s the FBI that’s involved in the investigation:

Lord Blair, who was the head of the Metropolitan Police at the time of the bombings in London on 7 July 2005, said a similar leak had happened then.

“It’s a different world in which the US operate in terms of how they publish things and this is a very grievous breach but I’m afraid it’s the same as before,” he said.

This is why my money is on the leaker being in the FBI.