North Korea has said upcoming U.S. and South Korean military drills are a "serious challenge" to peace on the Korean peninsula, warning of "negative consequences" to exercises it framed as a major threat to its security.

North Korean troops have started removing propaganda loudspeakers used to blare unsettling noises along the border, South Korea's military said Saturday, days after Seoul's new administration dismantled ones on its side of the frontier.

Yoon was impeached and removed from his post for briefly placing South Korea under martial law in December, citing supposed threats from anti-state forces and North Korea sympathi