Pakistan on Tuesday reiterated its stance on US drone attack in tribal areas, saying the strikes are unlawful , having negative implications. “Our views on drone strikes has been clear. These attacks are in violation of sovereignty”, Foreign Office spokesman said. He said that the Pakistan acknowledged ‘tactical advantage’ to US drone strikes . Earlier on Monday, US President Barrack Obama for the first time officially acknowledged that the US drones have been hitting Taliban and al-Qaeda targets within Pakistan.