A black ribbon is tied to the Spainish national flag in the Palace of La Moncloa in Madrid, Spain, Nov. 14, 2015. Spain's Prime Minister Mariano Rajoy said Spain is solidarity with France in the wake of terror attacks on Friday night in Paris which has left more than 120 people dead. (Xinhua/Xie Haining)

MADRID, July 4 (Xinhua) -- The Danish national of Syrian origin arrested in Malaga on Friday for being a member of the Islamic State (DAESH) is considered to be "one of the most dangerous jihadists arrested in Spain," the Spanish Interior Ministry said on Monday.

The detainee, who has been sent to preventive prison without bail, has been named as 27-year-old Ahmed Samsam.

He traveled to Spain on June 14, a day before he was due to have begun a prison sentence in Denmark, after spending three years fighting in Syria.

The Spanish Interior Ministry reported that the fact that Samsam had "returned from the conflict zone, added to his experience in the use of arms and explosives and the high level of radicalization," made him so dangerous.

It added that on arrival in Spain Samsam had begun "actively searching for a means to purchase arms and protective material, such as bulletproof vests."

Monday also saw Spanish Interior Minister Juan Ignacio Zoido host a G4 meeting with the Interior Ministers of France, Morocco and Portugal in Seville, southern Spain.

He highlighted the importance of the G4 group of Mediterranean countries as "a useful forum."

"It has allowed us to get even closer to our respective security forces and to strengthen and intensify the cooperation in the fight against terrorism, organized crime and drug trafficking and to allow us to work together in the management of migratory flows, based on shared responsibility," said the minister.

The four interior ministers signed a joint statement agreeing to continue and increase their cooperation in the above matters, which Zoido described as "another step forward in the joint work of the G4".