Romania's Defense Ministry says a drone shot down during Russia's attack on Ukraine's port installations on the Danube early on December 14 fell on Romanian territory, leaving a 1 1/2-meter deep crater near the village of Grindu, which is located some 8 kilometers from the Ukrainian port of Reni.
Romanian F-17 jets and Eurfighter warplanes belonging to NATO ally Germany were scrambled on a surveillance mission of Romania's airspace, the ministry said in a statement, adding that an investigation was initiated at the crash site.
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Romania firmly condemns Russia's strikes on Ukrainian civilian infrastructure, the ministry added.
Russia's drone attack on southern Ukraine lasted six hours and left at least 11 people wounded, including three children, causing extensive damage to civilian and port infrastructure in the Odesa region and the Danube area close to the Romanian border, Ukraine's Southern Defense Force said.
Air defenses destroyed two drones in the Kherson region, five in the Mykolaiyv region, and 32 in the Odesa region, it said.
In the city of Odesa, a dozen buildings were damaged by drone debris. Odesa regional Governor Oleh Kiper said two grain warehouses were also damaged in the Danube port of Izmayil.
In Russia, two drones were shot down over Moscow by air defenses on December 14, the mayor of the Russian capital, Sergei Sobyanin, said on Telegram, adding that there were no injuries or serious damage.
Separately, the Russian news agency Interfax quoted the Defense Ministry as saying air defenses shot down nine Ukrainian drones over the Kaluga and Moscow regions on December 14.
The claims could not be independently verified.