MOSCOW, October 2. /TASS/. The cases of suspicious infections in the Ukrainian army that are difficult to treat are most probably connected with the operation of US biolaboratories in Ukraine, the deputy speaker of the State Duma, Irina Yarovaya, has said. "The Pentagon’s bio-laboratories in Ukraine are with a high degree of probability the source of infection of Ukrainian soldiers," said Yarovaya, a co-chair of the parliamentary commission for investigating the activities of US laboratories in Ukraine.