
Ukraine war latest: Ukrainian drone strikes hit two Russian defense plants, grounding flights in Moscow, security service says
Key developments on May 7: * Ukrainian drone strikes hit two Russian defense plants, grounding flights in Moscow, security service says * Kellogg says Ukraine proposed 30-km demilitarized buffer zone, admits Putin main obstacle to ceasefire * Two volunteers die in Ukraine mine-clearing incident, including British aid worker Chris Garrett * Ukrainian drones reportedly