One of Ukraine's largest drone strikes on Russia killed at least four people, including three near Moscow, and wounded a dozen others, local authorities said Sunday.

The drone attacks that the grey-bearded 50-year-old oversees from the bunker — in a secret location in Ukraine — are recorded and analysed, for him to develop strategies to stop the Russian invasion.

Russia has launched its biggest drone and missile strikes of the war to date. But Ukraine has hit back effectively.

Kyiv is asking its Western allies for more ammunition deliveries for its anti-air defences as Ukraine endures daily Russian strikes.

By Vladyslav Smilianets and Valentyn Ogirenko EASTERN UKRAINE, May 28 (Reuters) - In a corn field in eastern Ukraine, soldiers fired drones into the sky using a slingshot, aiming at military targets in the country's Russian-occupied east,

A naval drone exploded near an oil terminal in the Romanian Black Sea port of Constanta on Friday morning, causing no injuries. The Russian embassy in Bucharest claimed the device was Ukrainian. DW has more.

The Ukraine-Russia ceasefire would include a suspension of all "kinetic activity" and a swap of 1,000 prisoners from each country, President Trump said.