Denmark's defense chief has called a series of unidentified drones being spotted near airports and military installations a "hybrid attack."

Denmark is probing potential Russian involvement after enduring the second drone attack this week as authorities are bracing for the possibility of more incidents. Large professional drones spotted at several airports and military air bases in Denmark disrupted flights and sparked a major police operation overnight.

In an era of hybrid warfare, there is a sense of embarrassment that Denmark's critical infrastructure has become vulnerable.

Denmark is leading a military exercise with hundreds of troops from several European NATO members in Greenland.

COPENHAGEN: Denmark has told its NATO allies that drone incursions which disrupted two airports this week were linked to a state actor, Latvia’s foreign minister said on Thursday (Sep 25), as Copenhag