As many as 168 children have been killed in drone strikes in Pakistan during the past seven years as the CIA has intensified its secret programme against militants along the Afghan border.
In an extensive analysis of open-source documents, the Bureau of Investigative Journalism found that 2,292 people had been killed by US missiles, including as many as 775 civilians.
The strikes, which began under President George W Bush but have since accelerated during the presidency of Barack Obama, are hated in Pakistan, where families live in fear of the bright specks that appear to hover in the sky overhead.
In just a single attack on a madrassah in 2006 up to 69 children lost their lives.
Chris Woods, who led the research, said the detailed database of deaths would send shockwaves through Pakistan, where political and military leaders repeatedly denounce the strikes in public, while privately allowing the US to continue.