US increasingly fearful Russian President Vladimir Putin will use chemical weapons in Ukraine

Ruddian President Vladimir Putin could resort to using Novichok in mass chemical weapon attacks in Ukraine if his troops continue to lose ground, US officials fear, according to a media report. As the progress of the war has gone increasingly in Kiev's favour, fears that Russia could take extreme measures to force Ukraine to surrender - such as launching a nuclear strike or a dirty bomb attack - have been rising, Daily Mail reported.