US drone 'kills Haqqani commander Sangeen Zadran' 6 September 2013 Last updated at 13:37 A US drone strike has killed a senior commander of the Taliban-linked Haqqani militant network in north-west Pakistan, officials say. Intelligence officials say Sangeen Zadran was among six militants killed when two missiles fired at a house in North Waziristan, near Afghanistan. Mr Zadran had been blacklisted as a terrorist by both the US and UN. The US has blamed the Haqqani network for a series of high-profile attacks in the border regions in recent years. There has been no official confirmation of the death toll. However, a spokesman for the Afghan Taliban has reportedly denied that Sangeen Zadran was killed in the strike. Zadran also served as the Taliban's shadow governor of Afghanistan's Paktika province. In 2011, the US state department added him to its list of specially designated global terrorists, claiming he led fighters in attacks across south-eastern Afghanistan and planned and co-ordinated the movement of hundreds of foreign fighters. Pakistan's foreign ministry has condemned the strike as a violation of its sovereignty. This was the second strike in a week, and the attacks caused the loss of innocent civilian lives and continued to affect US-Pakistan relations, the ministry added. There have been fewer strikes in recent years, but Pakistani Prime Minister Nawaz Sharif has demanded an end to all attacks. The Haqqani network has been described by US military commanders as one of the most resilient militant groups operating in Afghanistan. It is believed to be based in Pakistan along the volatile and porous border and regularly attacks US forces in Afghanistan from its mountain bases in Pakistan. Mr Sharif has called for a joint strategy to stop US drone strikes. On Friday, former cricketer turned politician Imran Khan on Twitter called the strikes extrajudicial killings that led to revenge attacks against Pakistan's security forces and citizens. The issue is hugely controversial in Pakistan, where parts of the government and military have often been accused of criticising the use of drones in public, but co-operating in private. It is estimated that between 2004 and 2013, CIA drone attacks in Pakistan killed up to 3,460 people - although this figure will not include the very latest strikes. About 890 of them were civilians and the vast majority of strikes were carried out by the Obama administration, research by the Bureau of Investigative Journalism said. Earlier this year, Mr Obama called the strikes part of a legitimate campaign against terrorism, but he also pledged more programme transparency and stricter targeting rules.