Nato’s secretary general, Jens Stoltenberg, was asked about the leaks by reporters in Brussels before Thursday’s meeting of Nato leaders.
He said: “Sharing intelligence is of great importance. Sharing intelligence is based on trust and we have seen in Nato over many, many years that we have been able to share intelligence in a good way and that has been of great importance to the alliance and for all allies.”
Stoltenberg said he was unable to comment further as he “did not know what actually happened”. He added that it was a bilateral issue between the US and the UK.
Ian Blair, who was Metropolitan police commissioner during the London underground bombings on 7 July 2005, said his investigation had also been troubled by leaks from US intelligence.
Blair said he was sure the leaks had “nothing to do with Trump” given that similar leaks had happened during his own time investigating a terror attack.
“I’m afraid this reminds me exactly of what happened after 7/7, when the US published a complete picture of the way the bombs had been made up. We had the same protests.
“It’s a different world in how the US operates in the sense of how they publish things. And this is a very grievous breach but I’m afraid it’s the same as before.”
Lord Carlile, the former independent reviewer of terrorism legislation, described the leaks as “very unusual and irresponsible” and called for those responsible to be “called to account”.
He said: “Photos of the backpack after the event could be of utility to future bombmakers, for obvious reasons. Also, it damages decades of confidence between the UK and US services, the cohesion of the ‘Five Eyes’
group [the US, UK, Canada, Australia and New Zealand], and sharing of information with French, German and other security services. These leaks made yesterday a very bad day for national security in several countries, and those responsible should be called to account.”