Relations between Pakistan and the United States have deteriorated after NATO helicopters and fighter jets attacked two Pakistani military outposts on Saturday killing at least 24 Pakistani soldiers. Pakistan described the attack as unprovoked and irresponsible. Pakistan responded by demanding the United States vacate an air base within 15 days that the CIA is suspected of using for unmanned drones. In addition, Pakistan has indefinitely shut down NATO supply lines through the country used by foreign forces in Afghanistan. NATO Secretary General Anders Fogh Rasmussen described the attack as a “tragic unintended incident.” But unnamed NATO officials have claimed the attack occurred after NATO and Afghan forces came under fire from the military outpost. The United States has vowed to investigate the killings.