Russian forces launched three strikes on Friday on Kharkiv, Ukraine's second-largest city, injuring 15 people, including three children, Mayor Ihor Terekhov said.

Late on September 20, Russian troops once again launched guided bombs on Kharkiv. Three districts of the city came under attack, with 15 people injured, according to the Kharkiv Regional Prosecutor's Office and Mayor of Kharkiv Ihor Terekhov.

According to the Kharkiv Oblast Prosecutor's Office, Russian Su-34 jets launched three guided bombs from across the border in Russia's Belgorod Oblast.

Russell Bentley, a U.S. national who went missing in Russian-controlled eastern Ukraine early this year, is believed to have been tortured to death by Russian soldiers who are now set to go on trial,

A Texan soldier fighting for Russia was killed in the spring, and Russia has said four Russian service members are to blame.

Four Russian soldiers have been charged by the Kremlin with killing a US citizen. Russell Bentley, 64, who fought alongside pro-Putin rebels in eastern Ukraine, was tortured and murdered by Russian servicemen,