ISIS tunnels under Iraqi army headquarters ; explosions kill Dozens of soldiers . Iraqi officials say they are investigating claims of abuses by soldiers after photos emerge . ISIS has launched a major assault on the city of Ramadi , an official says .
ISIS tunnels under Iraqi army headquarters ; explosions kill dozens of soldiers . Iraqi officials say they are investigating claims of abuses by soldiers after photos emerge . ISIS has launched a major assault on the city of Ramadi , an official says .