Ceasefire Frays as Both Sides Press Limited Offensives and Drones Dominate May 11

ISW’s May 11 update notes that fighting remained limited on the final day of the May 9–11 ceasefire, with both sides accusing the other of violations; no long-range strikes were reported, but Russian forces pressed with artillery and drones (notably Molniya) across multiple sectors while Ukrainian forces conducted counterattacks and drone activity in Donbas. Reports of Ukrainian Hornet/Molniya drone activity near occupied Mariupol alarm milbloggers about expanding rear-area interference and battlefield air interdiction. Separately, Ukraine says Russia targeted rear infrastructure such as a Perm oil facility and there were infiltration attempts in Sumy Oblast; Russia continues air, missile, and drone campaigns with Kh-101 variants and BM-35/70 drones. The briefing emphasizes that ceasefires without credible enforcement, monitoring, and dispute resolution are unlikely to hold.