The blast happened at the port of Constanta at around 10.30am EEST (8.30am UK time). The surrounding area has been cordoned off with a huge pillar of smoke seen pouring into the sky. The Romanian Defence Ministry said the drone was thought to be "of the type used in the war in Ukraine", with Romanian media reporting that it was a Magura-type drone.

Ukraine launched hundreds of drones at targets across Russia, including scores over the St. Petersburg region, on the final day of Russia’s most important investment forum.

Ukraine's 3rd Special Operations Forces Regiment said its drones are capable of targeting Russian equipment and logistics along the Melitopol — Chonhar route in Ukraine's south.

Ukraine executed a long-range drone assault targeting military and energy facilities in Russia, particularly near Saint Petersburg and Krasnodar Krai.

As a startling map shows how warfare has changed around the world, experts have warned Australia is at risk despite being at the heart of an unprecedented $8 billion global boom.

Russia has used drone “swarms” to great effect against Ukrainian tanks and armored vehicles throughout the war, leading Kyiv to change its battlefield strategy.

The U.S. military is disputing Iran's claims that it fired missiles and drones to warn U.S. warships to retreat. CBS News' Charlie D'Agata reports.