North Korean leader Kim Jong-un's half-brother is dead, according to foreign news sources.

  • Kim Jong-nam was allegedly poisoned by two women believed to be North Korean agents
  • He criticized his brother's, North Korean leader Kim Jong-un, regime 

South Korean news sources say Kim Jong-nam was killed in Malaysia Monday morning.

Authorities in Malaysia say two North Korean agents poisoned him, however the Associated Press went into more detail and reported that, "Multiple South Korean media reports, citing unnamed sources, said Kim Jong Nam was killed at the airport by two women."

TV Chosun, citing unidentified "multiple government sources," said the women were believed to be North Korean agents and used poison needles to kill Kim. It said they fled in a taxi and were being sought by Malaysian police. 

Kim Jong-nam is the eldest son of North Korea's longtime leader, Kim Jong-il.

He occasionally criticized his younger brother's regime and had not lived in North Korea for years.

The Associated Press contributed to this article.