MOSCOW, April 11. /TASS/. Russia received no explanations regarding operation of US biological laboratories in Ukraine, Russian Deputy Foreign Minister Sergey Ryabkov told reporters Tuesday.

The diplomat noted that the report of the parliamentary commission on US bio laboratories in Ukraine states an unacceptable activity of the US and Ukraine on bio security with a military component.

"This does not comply with the requirements of the Biological and Toxin Weapons Convention. Unfortunately, the questions that the Russian Federation raised before the mentioned states, as well as our complaints, were left without response. In this situation, it is extremely important for the parliamentary commission to carry out its investigation and to put all facts on paper; it is the most serious proof of violations," he said.