The US has been carrying out follow-up attacks after its drone strikes in Pakistan, specifically targeting people coming to the aid of the wounded. The tactic has been widely condemned, including by the UN – which considers it a war crime.

A Guardian report by Glenn Greenwald shows the US government's hypocrisy regarding such tactics. While the FBI has warned that “terrorists may use secondary explosive devices to kill and injure emergency personnel responding to an initial attack,” the US regularly applies the same methods.

A 2004 FBI alert warned Americans against secondary attacks meant to “incite more terror,” advising that such incidents can usually be expected within an hour of the initial attack.