A National Police spokesman confirmed to The Associated Press that its officers assisted a North Korean woman with unspecified injuries. The spokesman, who wasn't authorized to be named in media reports, declined to comment further.

An Interior Ministry official who was also bound by customary rules of anonymity said the incident was "under investigation'' and noted that North Korean authorities hadn't filed any official complaint

The embassy couldn't be reached for comment Wednesday.

Alejandro Cao de Benos, an aide to the North Korean government who takes media, business and other visitors to the secluded country and organizes cultural exchange programs with Pyongyang, told the AP that he had spoken to embassy staff who had told him that the assailants had taken computers and cellphones before escaping.

"What I can say, the part of it that I'm sure about, is that this was a robbery,'' said Cao de Benos, who also heads the Korean Friendship Association based out of Spain.  "I don't have any other detailed information at the moment on what could have been the motive.''

El Confidencial said police didn't enter the embassy. The report also said that two vans left the embassy minutes after the police showed up.

An official with Spain's foreign ministry said the government had no comment, and that the issue was a police matter. The official, speaking anonymously in line with internal rules, said that authorities had been in touch over the incident with the only diplomat of North Korea's embassy in Madrid, Charge d'Affaires So Yun Sok.

Kim Hyok Chol was ambassador to Spain until September 2017, when the Spanish government expelled him and another diplomat following Pyongyang's round of nuclear tests and missile launches over neighboring Japan.

Kim has since become a close aide to North Korean leader Kim Jong Un, and the country's representative for US affairs. (AP)