The militants together with the Russian military have killed about 10,000 Ukrainians, another 20,000 were injured within two years since the start of the anti-terrorist operation in eastern Ukraine, First Deputy Secretary of NSDC of Ukraine Mykhailo Koval told a meeting of the Interparliamentary Assembly of the Verkhovna Rada of Ukraine, the Seimas of the Republic of Lithuania and the Sejm and Senate of Poland, Ukrinform reports.