Estonia is extending a fence along its border with Russia and building anti-tank ditches and bunkers in preparation for a potential conflict with Moscow.

Amidst the brewing tensions in Europe, Danish authorities reported that they had detected multiple drones at several military sites overnight.

Officials in Europe have been on high alert after drone incursions in Denmark shut down air traffic several times over the past week.

European defense ministers have agreed to develop a “drone wall” along their borders with Russia and Ukraine to better detect, track and intercept drones violating Europe’s airspace.

Denmark reported more suspicious drones above its largest military base, after ones grounded flights earlier in the week. Other nations reported sightings.

Denmark said drones that halted flights at its main airport on Monday were the most serious attack yet on its critical infrastructure and linked them to a series of suspected Russian drone incursions and other disruptions across Europe.

Russia's so-called "shadow fleet" of oil tankers are being used to "launch and control" Russian drones over European cities, President Volodymyr Zelensky said on Sept. 28, citing intelligence reports.

German defence startup Helsing unveiled a new autonomous combat drone on Thursday, joining a race to build remote-piloted systems that can swarm into battle with fellow robots or team up with crewed fighters to help reshape the future of warfare.

The recent wave of mysterious drone sightings across Europe is the latest in a long history of similar scares. Clusters of UFO reports in Northern Europe have generated occasional panics for over a century. The European done sightings may be a projection of geopolitical tensions between Europe and Russia.

Denmark spotted drones flying over several army bases overnight – part of a wave of unexplained sightings causing chaos across Europe. The Danish defence ministry said it deployed ‘several capacities’ after sightings from Saturday into Sunday.

Germany is to enhance its capabilities in countering the threat of illegal drone overflights, Interior Minister Alexander Dobrindt has said following a week of scares in northern Europe. "I aim to lay down in the air security law that the military will be able to provide domestic assistance to the police,