NEW : Growing concern Mosul Dam is not being properly maintained by Kojo , U.S. official says . A colonel with the Peshmerga told CNN the operation began early Saturday with Kurdish forces advancing toward the dam as the United States carried out airstrikes against `` mobile ISIS positions . '' NEW : U.S. intelligence agencies are watching the Haditha Dam , the official says . U.S. fighter jets and drones carry out airstrikes near Kojo village and Kojo village , the U.S. military says . Earlier this year leader tells a British broadcaster the death toll in Kojo village is nine .
NEW : Growing concern Mosul Dam is not being properly maintained by Kojo , U.S. official says . NEW : U.S. intelligence agencies are watching the Haditha Dam , the official says . U.S. fighter jets and drones carry out airstrikes near Kojo village and Kojo village , the U.S. military says . Earlier this year leader tells a British broadcaster the death toll in Kojo village is nine .