Some are spending life savings to stay out of the war, but such actions are seen as treasonous by those already fighting

At the last military checkpoint before he exited Ukraine in April, a 39-year-old man from Odesa handed over papers showing he had a serious spinal injury, thus exempting him from military service and from the ban on adult men leaving the country.

“One of the soldiers said, ‘That hospital really likes this diagnosis, huh?’” recalled the man. “I could see they knew exactly what was going on, and it wasn’t the first time. But they were powerless to do anything, so waved me through,” he said.

Overnight attack on southern port city wounded three, according to local governor; currency falls to weakest point in almost 17 months

• What we know on day 537 of the invasion

Ukraine has condemned what it called “provocative” Russian actions, a day after a Russian warship fired warning shots at a cargo vessel in the Black Sea.

The ministry said in a statement:

The ministry of foreign affairs of Ukraine strongly condemns the provocative actions carried out by the Russian Federation on August 13 in the Black Sea in relation to the Turkish dry cargo vessel ‘Sukru Okan,’ which was en route to the port of Izmail,

The Russian Navy grossly violated the UN Charter, the UN Convention on the Law of the Sea, and other norms of international law. These actions exemplified Russia’s deliberate policy of endangering the freedom of navigation and safety of commercial shipping in the Black Sea.

Seven people, including a young baby, killed by Russian shelling in Kherson; Russian warship’s ‘warning shots’ at Black Sea cargo ship

Seven people including a 23-day-old girl were killed by Russian shelling in the Kherson region on Sunday, Ukraine’s internal affairs ministry said. An attack on the village of Shiroka Balka killed four members of the same family – including their young baby – and another resident. Two men were killed in the neighbouring village of Stanislav.

Volodymyr Zelenskiy promised justice for the attacks on Kherson. “There is no day when Russian evil does not receive our entirely just response,” said Ukraine’s president in his Sunday night video address, adding: “We will not leave any of Russia’s crimes unanswered.”

A Russian warship fired warning shots at a cargo ship in the south-western Black Sea, the first time Russia has fired on a merchant ship since exiting a UN-brokered grain deal last month. Russia said in a statement that its Vasily Bykov patrol ship fired automatic weapons on the Palau-flagged Sukru Okan vessel after the ship’s captain failed to respond to a request to halt for inspection.

Three civilians were injured in the Kursk region from shells coming over the Ukrainian border, the regional governor said. Roman Starovoit said Ukraine was behind the shelling, Ukraine did not claim responsibility and it was unclear where the shelling originated.

Ukrainian forces were trying to pierce Russian lines in the western parts of Donetsk region, a Russian-installed official said. Vladimir Rogov said there had been intense fighting south of Velyka Novosilka as Ukrainian troops tried to push down to the coast on the Sea of Azov. “The enemy managed to enter and gain a foothold in the northern part of Urozhaine after two weeks of the heaviest and bloodiest battles for this settlement,” Rogov said.

The governor of the Russian region of Belgorod blamed a Ukrainian drone for damage to an apartment building on Sunday, after Russia’s defence ministry said air defences shot down at least four Ukrainian drones close to the border. Russia’s defence ministry said air defences shot down another drone later on Sunday and there were no casualties.

Germany will deliver a Luna New Generation drone system to Ukraine, Bild am Sonntag has reported. The equipment will include a ground control station with several drones, a launch catapult and military trucks.

Authorities briefly halted traffic on the Russian-built Kerch Bridge connecting occupied Crimea with Russia – but did not provide a reason why. It came one day after Russian air defence reportedly thwarted three Ukrainian missile attacks.

Ukraine has become the most heavily mined country on Earth after a year and a half of Russian troops laying them down. Soldiers have been unearthing five mines for every square metre in some places, Oleksii Reznikov, Ukraine’s defence minister, told the Guardian.

Southern region has been the scene of intense fighting in recent weeks as Ukrainian forces counterattack

• Russia-Ukraine war – latest news updates

Seven people including a 23-day-old baby girl were killed in Russian shelling in Ukraine’s southern Kherson region on Sunday, the country’s internal affairs ministry said.

Artillery shelling in the village of Shiroka Balka, on the banks of the Dnipro River, killed a family – a husband, wife, 12-year-old boy and the 23-day-old girl – and another resident.