A missing nine-year-old boy, whom federal authorities say was kidnapped in by his father from Seattle, has been located and is safe in an island 1,500 miles northeast of New Zealand. according to the FBI.

Jeffrey Hanson, the boy’s non-custodial father, is being detained on the island of Niue, the FBI said.

The FBI issued an alert earlier this month advising mariners in the Pacific that Billy Hanson and his father set sail from Seattle on Sept. 4, in a sailboat called “Draco,” and may have sailed to Hawaii, American Samoa, Guam, the Northern Mariana Islands, and other Pacific islands.

A federal arrest warrant was issued for Billy’s father, Jeffrey Ford Hanson, on Sept. 12, in the U.S.  District Court in Seattle after he was charged with international parental kidnapping.

The FBI and the Seattle Police Department Major Crimes Task Force worked with local, state, federal, and international partners to locate Billy, who is from Hazleton, Pennsylvania, and was last seen with his father in Seattle.

Federal officials said Hanson is a known drug abuser with a volatile personality. 

Authorities are working to reunite Billy with his mother, the FBI reported.