The government on Friday morning deported to China a man claiming to be the eldest son of North Korean leader Kim Jong Il, along with his three companions.

The man, who identified himself to immigration authorities earlier this week as Kim Jong Nam, 29, was accompanied by two women and a 4-year-old boy, believed to be his wife, a relative and his son.

The four were detained on suspicion of illegal entry into Japan after arriving at Narita airport from Singapore on Tuesday afternoon, Justice Ministry sources said. The man, the boy and one of the two women were using fake Dominican Republic passports, but the other woman possessed a real Dominican passport, according to the sources.