(MADRID) — Spain has issued at least two international arrest warrants for members of a self-proclaimed human rights group who allegedly led a mysterious raid at the North Korean Embassy in Madrid last month and offered the FBI stolen data from the break-in.

A National Court judge who lifted a secrecy order in the case Tuesday said an investigation of the Feb. 22 attack uncovered evidence that “a criminal organization” shackled and gagged embassy staff members before escaping with computers, hard drives and documents.

The intruders also urged North Korea’s only accredited diplomat in Spain, business envoy So Yun Sok, to defect, Judge Jose de la Mata said in a written report on the Spanish investigation. So refused to do so and was gagged, according to the report.