At least three people were killed in a US drone strike on Wednesday in Mir Ali area of the North Waziristan agency, an area bordering Pakistan and Afghanistan.According to the sources, the unmanned plane fired two missiles on a house in Tapi area near Mir Ali, the main town of lawless and troubled region, killing three people and injuring several others.“More drones were flying in the air making it difficult for the rescuers to save others.”Attacks by an unmanned American aircraft are deeply unpopular in Pakistan, which says they violate its sovereignty and fan anti-US sentiment, but US officials are said to believe the attacks are too important to give up.In final US Presidential election debate in Florida, US president Barak Obama and his Republican rival Mitt Romney have emphasized to continue drone strikes inside Pakistan.Recently, Pakistan Tehrik-i-Insaaf carried out a peace march towards South Waziristan, protesting against the US drone attacks, which had killed several innocent people.