The U.S. military conducted a second airdrop of humanitarian aid to Iraq refugees under threat from militants in northern Iraq, the Pentagon said on Friday. Three planes dropped 72 bundles of supplies including more than 1,500 gallons of water, according to Pentagon spokesman Rear Admiral John Kirby. "This airdrop was conducted from multiple airbases within the U.S. Central Command area," and was accompanied by two fighter jets the Pentagon said in a statement. Members of Yazidi religious minority have been trapped for days by Islamic State militants and fear they will be slaughtered if they leave the mountains. The Pentagon also released video of a Thursday-night drop.