Ukraine forces battled pro-Russian militants in East Ukraine in pitched battles as militants in Odessa vowed to retake buildings they were forced out of amid clashes that left more than 40 people dead. Meanwhile, Ukrainian troops pressed forward with an offensive against militants in Slovyansk, a city in East Ukraine that has become a center of militant unrest.
Russia's War Against Ukraine
USA Today: Violence escalates in eastern Ukraine, Odessa
People near the House of Union building after burning that caused at least 40 dead people in Odessa on May 2.
