Today’s announcement is intended to shed light on the US’s controversial targeted killing programme, in which it has used drones to run an arms-length war against al Qaeda and Islamic State.

The US Government also committed to continued transparency saying it will provide an annual summary of information about the number of strikes against terrorist targets outside areas of active hostilities as well as the range of combatants and non-combatants killed.

But the US has not released a year-by-year breakdown of strikes nor provided any detail on particularly controversial strikes which immediately sparked criticism from civil liberty groups.

Jamel Jaffer, Deputy Legal Director of the American Civil Liberties Union said: “While any disclosure of information about the government’s targeted-killing policies is welcome, the government should be releasing information about every strike—the date of the strike, the location, the numbers of casualties, and the civilian or combatant status of those casualties. Perhaps this kind of information should be released after a short delay, rather than immediately, but it should be released. The public has a right to know who the government is killing—and if the government doesn’t know who it’s killing, the public should know that.”

The gap between US figures and other estimates, including the Bureau’s data, also raised concerns.

Jennifer Gibson, staff attorney at Reprieve said: “For three years now, President Obama has been promising to shed light on the CIA’s covert drone programme. Today, he had a golden opportunity to do just that. Instead, he chose to do the opposite. He published numbers that are hundreds lower than even the lowest estimates by independent organisations. The only thing those numbers tell us is that this Administration simply doesn’t know who it has killed. Back in 2011, it claimed to have killed “only 60” civilians. Does it really expect us to believe that it has killed only 4 more civilians since then, despite taking hundreds more strikes?

“The most glaring absence from this announcement are the names and faces of those civilians that have been killed. Today’s announcement tells us nothing about 14 year old Faheem Qureshi, who was severely injured in Obama’s first drone strike. Reports suggest Obama knew he had killed civilians that day.”

The US government said in a statement: “First, although there are inherent limitations on determining the precise number of combatant and non-combatant deaths, particularly when operating in non-permissive environments, the US Government uses post-strike methodologies that have been refined and honed over years and that use information that is generally unavailable to non-government organsations.”