South Korean and U.S. troops held joint future combat drills involving drones, an unmanned vehicle and wearable laser sensors this week as part of efforts to modernize their militaries, the South's army said on Saturday.

The training came as South Korea's military conducts a series of annual Hoguk autumn exercises aimed at improving responses to North Korea's nuclear and missile threats.

More than 120 soldiers from both sides joined forces to fight against a trained team of opposing forces in a mock-up town that appeared similar to the North Korean capital of Pyongyang, built at the Korea Combat Training Center in the mountains in the eastern city of Inje.