MARIUPOL, Ukraine (AP) — Thousands gathered for peaceful demonstrations Thursday in at least four eastern cities to denounce Russia for its perceived meddling in Ukrainian affairs, a day after the most lethal clash so far killed three pro-Russian activists.

Political developments in eastern Ukraine have for weeks been dominated by a small, vocal and armed opposition to the interim government in Kiev. Thursday’s rallies, by contrast, drew crowds who listened to speeches condemning Russia and resisting the pro-Russian movement that is pushing for autonomy for eastern Ukraine.