WW4 File: UKRAINE, RUSSIA AT WAR: Ukrainian Army, National Guard, Interior Ministry troops launch new offensives on Apr. 24, target Moscow-backed separatist strongholds in Donetsk Oblast; government troops: 1) “eliminate” 5 rebels during op to remove insurgent checkpoints around Slaviansk, 2 hours later pull back, reassess storming city of 130,000; 2) repel 100 separatists in attack on army base near Artemivsk, 40 km SE of Slaviansk, insurgents (i.e., Russian special forces) “opened fire with automatic weapons, machine guns and used grenades”; 3) clear city hall in Mariupol, on coast of Sea of Azov, of rebels, no bloodshed reported; leaders of rebel “Donetsk People’s Republic”: “A combined arms operation has been launched in Slaviansk. This means only one thing: a civil war”; top Ukrainian security official informs Kyiv Post: Government reformulating anti-terrorist op in light of intelligence concerning new Russian military drills near SE Ukraine