France's foreign minister Jean-Yves Le Drian warned Sunday those sanctions could be expanded, saying Russia must be held "responsible" for the dissident's health.
Tanks are parked in columns beside the railway, which runs parallel to the M4 highway. Military trucks rumble past, heading toward the southern city of Rostov-on-Don, close to the border.
Moscow denies it is part of the conflict in eastern Ukraine and says it provides only humanitarian and political support to the separatists.
NATO voiced concern on Thursday over what it said was a big Russian military build-up near eastern Ukraine after Russia warned that a serious escalation in the conflict in Ukraine's Donbass region could "destroy" Ukraine.
The drills will involve more than 1,000 military personnel from at least 5 NATO member states and will be held in a few months, the Ukrainian armed forces said in a statement on Facebook on Saturday.
In remarks to parliament, Khomchak also accused pro-Moscow separatists of systematically violating a ceasefire in the conflict in eastern Ukraine agreed in July 2020.
Ukraine and Russia have traded blame for a spike in violence in the conflict, which Kyiv says has killed 14,000 people since 2014.
Ethnic Armenian troops in the Nagorno-Karabakh region ceded swathes of territory in and around the enclave to Azerbaijan in a six-week conflict in 2020 that claimed thousands of lives.
The question of expanding and bolstering the Russian military base on the territory of Armenia has always been on the agenda.