<h1>Russian missile and drone strikes kill four, injure 20; Ukraine urges more air defenses and tougher oil sanctions</h1> Russian missile and drone strikes killed at least four and wounded 20 in Ukraine, including two deaths in the capital and two in a regional area, with state authorities reporting multiple intercepted missiles and drones and damage to civilian buildings and infrastructure. Ukraine's president renewed urgent appeals to Western partners for advanced air-defense systems, including Patriot batteries and longer-range strike capabilities, and urged expansion of sanctions on the Russian oil sector. International diplomatic and security discussions are ongoing between Western states and Russian representatives, with potential high-level meetings contingent on perceived progress toward de-escalation.