He wrote: "Rapid response team officers of the Ukrainian Interior Ministry 'Sokil' special forces in conjunction with the Interior Ministry of Ukraine in Donetsk region traffic police stopped a car to check documents near Pashkovskii Street in Mariupol at 6.15 p.m today.
"The militants' subversive reconnaissance group opened fire. Three police officers were seriously injured during the clash. One of them died in hospital from his injuries. One of the criminals was killed during pursuit. The other one fled the scene. Mariupol police was alarmed. Investigative activities are under way.
"The bag with explosives was discovered in the militants' car. The bomb-disposal experts are working at the crime scene.
"An attack that could possibly claim dozens of lives of peaceful citizens of Mariupol was prevented at the expense of the Donetsk region police officer's life."