More than 500 Ukrainian drones attacked Russia overnight, killing three people around Moscow, authorities said on Sunday. Air defences shot down 556 drones in more than a dozen regions, including Moscow, Russia’s defence ministry said. The attack came after Ukrainian President Volodymyr Zelenskyy vowed on Friday to launch more retaliatory strikes because of an earlier Russian attack on Kyiv that killed 24 people. Moscow and Kyiv have traded attacks following a prisoner swap and the expiration of a three-day truce on Tuesday.

The Trump administration on Saturday allowed a sanctions waiver to lapse that had previously allowed countries including India to buy Russian seaborne oil after a month-long extension aimed at easing oil supply shortages and high prices due to Iran’s closure of the strait of Hormuz. The US Treasury secretary, Scott Bessent, had previously said he would not renew the general licence allowing the purchase of Russian oil stored on tankers. As of early afternoon Washington time on Saturday, no renewal notice had been posted on the Treasury website.

Two top Democratic US senators, Jeanne Shaheen and Elizabeth Warren, on Friday urged the Trump administration against renewing the waiver because it was providing revenue to Russia to aid its war in Ukraine, but said there was no evidence it was bringing down fuel costs for American consumers.

An unexploded projectile was discovered on a property in south-eastern Romania near the EU and Nato member’s border with Ukraine on Saturday, its defence ministry said. Romania shares a 650-km (400-mile) land border with Ukraine. Russian drones attacking Ukraine’s ports on the Danube river have repeatedly breached Romanian airspace and fragments have sometimes fallen on its territory as Ukrainian forces shoot them down. An unguided reactive projectile was found in the yard of an uninhabited house in the village of Pardina in Romania’s Tulcea county, the ministry said without indicating its suspected origin.

Last month, an explosive drone landed in a back yard in the city of Galati, marking the first time since the start of the Ukraine war that such an incident had damaged property in Romania.

The leaders of Nato’s 14 eastern flank nations this week said Russia’s repeated violations of their airspace underlined the urgent need to consolidate the alliance’s air defences against missiles and drones. Several Russian and Ukrainian drones have crashed in Latvia since Russia invaded Ukraine, stirring public disquiet in the small former Soviet republic that is now a member of Nato and the EU.

Latvian President Edgars Rinkevics on Saturday proposed opposition lawmaker Andris Kulbergs as the next prime minister after Evika Silina resigned. Silina stepped down triggering the collapse of her coalition after she dismissed defence minister Andris Spruds because Ukrainian drones strayed into Latvia and exploded at an oil facility. The Latvian army said it failed to detect the drones as they crossed from Russia. Silina blamed Spruds for not developing anti-drone systems quickly enough. In response, Spruds’ Progressives party withdrew support from Silina’s government on Wednesday, leaving her without a parliamentary majority and exposed to a no-confidence vote.