Russia to hold informal UN Security Council meeting on Kiev's crimes / Kiev receives 3.5 bln euro tranche from Brussels / Kiev's violation of moratorium, Black Sea initiative: what Lavrov said / Oslo ready to continue arming Kiev with weapons, unwilling to send troops -- Russian envoy / Germany's acting foreign minister arrives in Kiev for unannounced visit / Kiev loses almost 22,000 troops, mercenaries in March in battles near LPR -- expert / Kiev tries to hinder negotiation process by postponing elections -- expert / Ukraine targets journalists in Donbass on Kiev regime's orders -- DPR head / Kiev trying to counterattack in Donetsk area amid Russian army's full dominance, says DPR / Kiev troops start using FPV drones of longer range