A drone was downed and detonated about 800 metres (875 yards) from the perimeter of Ukraine's South Ukraine nuclear power plant overnight, the International Atomic Energy Agency said in a statement on Thursday.

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

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.

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 air warfare.

Militaries around the world are seeking low-cost, easy-to-make ways to exhaust an enemy’s air defenses.

The explosions happened Saturday night an area controlled by Viv Ansanm, a powerful gang coalition that the U.S. has designated as a foreign terrorist organization.

The airspace over Denmark's Aalborg Airport was reopened early on Friday after a closure for the second night in a row due to suspected drone activity, police said. "The airspace over Aalborg Airport has been reopened on Friday at 00:35 (2235 GMT) after having been shut down due to suspicion of drone activity,

A super-secret Lockheed Martin Skunk Works project is no longer a secret after the company revealed its Vectis Collaborative Combat Aircraft (CCA) – an autonomous stealth fighter drone developed entirely in-house with company funds.