North Korea announces it is severing hotlines with South Korea in retaliation for actions taken by defectors who sent anti-Pyongyang leaflets to the border. In addition, South Korea says the North refused to respond to calls to its liaison office.
North Korea launches a Short-Range Ballistic missile near Wŏnsan towards the Sea of Japan, according to South Korea. The missile reportedly lands in Japan's exclusive economic zone (EEZ) after traveling 450 km.
The South Korean Joint Chiefs of Staff and the United States Strategic Command report North Korea fires three ballistic missiles into the Sea of Japan. The short-range ballistic missiles flew about 500 to 600 kilometers (310 to 375 miles) before crashing in the sea, sufficient to target the southern part of South Korea where the U.S. Terminal High Altitude Area Defense system is set to be installed.
North Korea deploys one or two intermediate-range ballistic missiles on its east coast, possibly preparing for launch on or around Friday, the anniversary of the birth of the country's founder Kim Il-sung, according to South Korea's Yonhap news agency.
South Korea imposes direct sanctions against North Korea that blacklists dozens of Northern companies and people for the first time, and bans ships that have visited North Korean ports in the previous 180 days from its waters.
North Korea launches a long range rocket that critics claim is a test of banned technology for a long range missile that could hit the United States. South Korea's military says the rocket released an object into orbit.
Kim Jong-un, the supreme leader of North Korea, announces that the country is now in possession of a hydrogen bomb, according to North Korean state media. Experts from South Korea however are skeptical about this claim.