Two Danish citizens of Somali origin, suspected of planning a terrorist attack in the country, were arrested in Denmark on Monday night, Danish Security and Intelligence Service (PET) said.
One was arrested at his residence in the coastal city of Aarhus, while the other was apprehended at an airport in the capital Copenhagen as he returned to the country, PET said in a statement on Tuesday.
The two brothers -- aged 18 and 23 -- had been living in Aarhus, about 170 kilometers west of Copenhagen, for the past 16 years.
They are suspected of having discussed the method, the target and the weapon types to be used while planning a terrorist attack, PET said.
Although a "specific act of terrorism has been averted, and as such the perceived threat level against Denmark is not affected, it remains high," it added.
PET says one of the suspects is believed to have "voluntarily been trained, instructed or taught" at a training camp in Somalia of al-Qaeda affiliated terrorist outfit al-Shabaab.
The men, charged with offenses under the Danish criminal code, will be produced at a court in Aarhus later in the day for a preliminary hearing, said the Danish Intelligence wing.
Denmark has been under terrorist threat since a Danish daily published cartoonist Kurt Westergaard's controversial drawings of Prophet Mohammed in 2005, which had outraged Muslims around the world.
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