Danish PM: airport drone incursion a ‘serious attack’ on critical infrastructure

Russia denies involvement after Copenhagen and Oslo airports forced to close after drone sightings

The Danish prime minister has said the country was subjected to the most serious attack on Danish critical infrastructure to date" after a drone incursion shut Copenhagen airport for several hours.

Mette Frederiksen said authorities were still investigating who was behind the suspected hybrid attack, but she said she could not rule out Russia.