Four areas of Ukraine controlled by Russia and pro-Moscow forces started their referendums on Friday on seceding from the eastern European country and joining the Russian federation.

Vladimir Putin has called for a mass mobilization of reservists to serve the Russian army in Ukraine.

This episode looks at what happens if southern and eastern regions of Ukraine join Russia and how Kiev will react having vowed to take back every inch of its territory even when the referendum decides these regions are part of Russia.

One of Russia's most senior security officials says he favors holding referendums in the breakaway Donbass region of eastern Ukraine in order to formally make them part of Russia.

Ukrainian forces claim to have marched farther east into areas abandoned by Russia, paving the way for fierce confrontation in the breakaway Donbas region as Kiev lobbies for more Western arms. 

Tunisia's new constitution has come into force after the country’s electoral commission approved the final results of last month’s referendum.

Australia's Prime Minister Anthony Albanese says gaining Indigenous Voice in parliament depends on winning a referendum in this regard.

Voters in a referendum in Tunisia have overwhelmingly backed a new constitution giving President Kais Saied nearly total powers, but a boycott by opposition parties has overshadowed the plebiscite.

Tunisians have taken to the polls to cast their ballots in a referendum on a new constitution promoted by President Kais Saied.

Hundreds of people in the Tunisian capital rallied against an upcoming referendum on a new constitution.