A general view of North Korea's embassy in Madrid, Spain, seen in this March 13, 2019 photo. AP-Yonhap

By Jung Da-min

Free Joseon, which claimed responsibility for a recent raid on the North Korea Embassy in Madrid, Spain, said it shared some related information with the FBI, in a statement Tuesday.

This indicates possible ties between the political group vowing to overthrow North Korea's Kim Jong-un regime and the U.S. agency.

In March 2017, the group, then called Cheollima Civil Defense, was in the spotlight for its first online video featuring Kim Han-sol, the son of Kim Jong-nam who had been assassinated in Malaysia.

The latest claim also supports allegations that U.S. authorities were involved in the rescue of Kim Han-sol and are currently protecting him.

There are cautious predictions that the incident may have negatively affected the ongoing denuclearization talks between North Korea and the U.S.

"The organization shared certain information of enormous potential value with the FBI in the United States, under mutually agreed terms of confidentiality," Free Joseon said in the latest statement.