"We reiterate our calls on the United States to faithfully observe their international obligations and provide comprehensive explanations on its military-biological activity within the country and abroad," Wang told a press conference, Sputnik reported.

Earlier in the day, Russia's upper house approved the final report of a parliamentary commission on the US biological program in Ukraine. The lower house approved the document on Tuesday. The paper is a result of the commission's one-year investigation.

According to Konstantin Kosachev, the deputy speaker of Russia's upper house of parliament, there are at least 30 US biological laboratories in Ukraine.

The official also added that that the Pentagon was the main commissioner of studies at such laboratories, which may be used for military purposes, including against Russia.