Last month, Spanish media reported that police were investigating after a group of unidentified assailants raided the North Korean Embassy in Madrid.

On Tuesday, the Spanish High Court released a document detailing the Feb. 22 incident. It said 10 people walked into the embassy at around 4:30 pm, carrying machetes, knives and other weapons, and began “shackling” staff and “violently beating” them. They reportedly seized flash drives, two computers, two hard drives and a mobile phone. Most of the individuals left at around 9:40 pm.

The document identified Adrian Hong Chang, a Mexican national and U.S. resident, as the leader of the raid. He was said to have been wearing a jacket with a pin of Kim Jong Un, and tricked police who arrived at the scene into thinking that he was a member of staff at the embassy.