<h1>Forces use water cannon, detain protesters in nationwide hostage-release demonstrations; clashes, fatalities, aid access and IHL concerns (Common Art. 3)</h1> Security forces used water cannons and detained dozens during a nationwide protest and strike by families of hostages and bereaved relatives demanding a hostage-release deal; demonstrators blocked roads, targeted political and military sites, and distributed symbolic ribbons. Organizers warned further military action risks captive lives, while government leaders opposed concessions and prepared for expanded military operations in densely populated areas. Clashes and reported fatalities amid humanitarian aid deliveries raised possible concerns under international humanitarian and human rights law, including use of force against protesters, treatment of detainees, protection of civilians and aid access. Separately, airstrikes extended to neighboring territory in retaliation for projectile attacks, heightening cross-border legal and security implications.