The Danish Security and Intelligence Service announced on Monday the arrest of three Iranians from an Iranian separatist group, and charged them with suspicion of spying for Saudi Arabia in Denmark. Another Iranian was arrested in the Netherlands.

Danish Security Service Director Finn Porsche Andersen said - at a press conference in Copenhagen - that the three members of the Arab Struggle Movement for the Liberation of Ahwaz are facing charges of involvement in intelligence activities for the Saudi intelligence service from 2012 to 2018.

The Danish Security Service stated that the three leaders were collecting information about individuals in Denmark and abroad, and were sending it to a Saudi intelligence service.

The three, whose identities have not been revealed, live in Denmark and have been under surveillance for several months.

The Danish police had accused the three of supporting an attack in Iran in 2018.

The Danish foreign minister - on his Twitter account - confirmed that the Saudi ambassador to Copenhagen had been summoned.

Dutch Foreign Minister Steve Block also summoned the Saudi ambassador to his country on suspicion of a link to Saudi Arabia with what is known as the Arab struggle for the liberation of the separatist Arabs of Ahvaz.

In the city of Delft, the Dutch authorities arrested another Iranian accused of planning to launch an attack in Iran and of belonging to a terrorist organization.

The Dutch News Agency confirmed that the authorities do not accuse the arrested man of spying for Saudi Arabia, as is the case with the three detainees in Denmark.

But a Foreign Ministry spokesman said that the Dutch Foreign Minister wanted to inform the Saudi ambassador that such unwanted activities as those accused by the movement in Denmark were unacceptable.