Ukraine war briefing: Crimea bomb kills ‘Ukrainian sub commander who defected’

Key Points:

• Robert Shageyev, a Russian military officer described as a former Ukrainian naval officer who defected during Crimea's annexation, was killed in a bomb attack in Sevastopol, Crimea; a Russian national woman was arrested on suspicion of carrying out the assassination on behalf of Ukrainian special services.
• A Russian drone attack on a passenger train in the Odesa region killed two crew members, with Ukrainian President Zelenskyy condemning the attack as targeting civilians deliberately.
• Ukrainian drone strikes forced the shutdown of an oil refinery in Orsk, Russia, due to irreparable damage to key infrastructure, with repairs expected to take up to six months amid sanctions.
• Poland thwarted a Russian plot to assassinate a Ukrainian American citizen in Warsaw, marking the first known attempt by Russia to target a US citizen on NATO territory, according to Polish Prime Minister Donald Tusk.
• Ukraine proposed a ceasefire deal with Russia to halt attacks on civilian ships in the Black Sea to reopen a vital grain corridor, while Russia continued strikes on Ukrainian ports; meanwhile, both sides exchanged bodies of deceased soldiers amid ongoing suspicions about the accuracy of casualty reporting.