Kim Jong Un
Police arrested a 25-year-old Indonesian woman and a man believed to be her boyfriend.
Kim Jong Nam was known to spend a significant amount of his time outside North Korea and had spoken out publicly against his family's dynastic control of the isolated state.
A South Korean official also said they believed he had been murdered, without giving further details.
Two officials were executed publicly, according to a South Korean newspaper.
Pyongyang claimed to have sent a friendly letter to the Kremlin.
South Korea says a launch on Wednesday was the latest move by Kim Jong Un in defiance of U.N. Security Council resolutions.
A huge drop in exports may pile pressure on leader Kim Jong Un.
The missile launch was a simulation that the supreme leader monitored himself.
The U.S. and South Korea are already in talks about a missile defence deployment.
The U.S. Treasury accused North Korea’s supreme leader of “notorious human rights abuses.”
Trump has said he is willing to talk to the North Korean leader to try to stop Pyongyang's nuclear program.
The isolated nation has conducted a series of missile launches ahead of the Workers' Party congress on May 6.
North Korea's growing gray market economy is posing a problem for Kim Jong Un and company.
U.S. and South Korean officials believe Pyongyang has developed nuclear weapons that threaten Japan and South Korea.
Some experts say the likelihood of another test has increased after a failed missile launch on Friday.
North Korea failed to launch a ballistic missile off the country's east coast.
The colonel worked for the North Korean military's General Reconnaissance Bureau.
The executive order freezes any property of the North Korean government in the United States, among other things.
North Korea has previously threatened pre-emptive attacks on South Korea and the United States.