DISINFO: Possible that Kiev plans provocation with chemical weapons in Donbas
The SBU or Ukranian military intelligence can commit an act of chemical terrorism in Donbas, in order to blame the separatists for this and escalate the conflict.
No evidence of any war preparations, and no independent sources confirm this. https://www.osce.org/ukraine-smm/reports
Recurring pro-Kremlin disinformation on Ukrainian aggression against Russia. euvsdisinfo.eu/disinformation-cases/?text=provocation&disinfo_issue=&date=, More on the fighting in Eastern Ukraine: https://www.rferl.org/a/29241384.html