LONDON (AP) — A human rights group is taking legal action against the British government for allegedly passing on intelligence to assist U.S. covert drone attacks in Pakistan.

London-based charity Reprieve and law firm Leigh Day & Co. are filing papers to the High Court Monday that say civilian staff at Britain’s electronic listening agency, GCHQ, could be liable as "secondary parties to murder" for helping the CIA in directing its drone attack program.

They say that credible reports suggest U.K. spy agencies gave information on the whereabouts of militants to the CIA.

The charity and law firm represent 27-year-old Noor Khan, whose father was killed by a drone in northwest Pakistan in March 2011 while attending a gathering of community elders.