Copenhagen -- The Danish Security and Intelligence Service (PET) said Wednesday that the PET and the Swedish Security Service (SAPO) have jointly arrested five individuals suspected of plotting a terror attack in Copenhagen.

The arrests were made at two flats in Herlev and Greve, both municipalities of Copenhagen. The PET believed that the suspects were preparing a terror attack on the Danish newspaper Jyllands-Posten in Copenhagen.

Three of the suspects are living in Sweden and have entered Denmark during the night of December 28-29, including a 44-year-old Tunisian, a 29-year-old Swede, born in Lebanon, and a 30-year-old Swede, whose country of origin is so far unknown.

Simultaneously, the Swedish authorities in Stockholm have arrested a 37-year old Swedish national of Tunisian origin.

The last one is a 26-year old Iraqi asylum seeker, who is living in Denmark.

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In Denmark, the PET have seized several objects, including some plastic strips that can be used as handcuffs as well as a machine gun with matching silencer and live ammunition.

"With these arrests we have succeeded in repelling an imminent terror attack," PET Director General Jakob Scharf said in a  statement.

He said several of the suspects "must be considered militant Islamists with relations to international terror networks."

The suspects arrested will be charged on Thursday in Copenhagen.