Drone strikes and targeted killings" of terror targets by the United States can be counterproductive and bolster the support of extremist groups, the CIA has admitted in a secret report released by WikiLeaks. The document, by the intelligence agency's Directorate of Intelligence, said that despite the effectiveness of "high value targeting" (HVT), air strikes and special forces operations had a negative impact by boosting the popular support of terror organisations. The CIA report is dated 2009 and talks of operations conducted in countries such as Iraq, Pakistan, Somalia, Afghanistan and Yemen. Operations against terror targets "may increase support for the insurgents, particularly if these strikes enhance insurgent leaders' lore, if non-combatants are killed in the attacks, if legitimate or semi-legitimate politicians aligned with the insurgents are targeted, or if the government is already seen as overly repressive or violent," the report said. "Senior Taliban leaders' use of sanctuary in Pakistan has also complicated the HVT effort," it reveals. "Moreover, the Taliban has a high overall ability to replace lost leaders ... especially at the middle levels." It speaks of drone strikes also having limited effect in Iraq. According to the Bureau of Investigative Journalism, US drone strikes have killed between 2,400 and 3,888 people in Pakistan in the years 2004 to 2014 and between 371 and 541 people in Yemen in the years 2002 to 2014.