Belarusians are voting in a closely-managed presidential election that is all but certain to extend the one-man rule of Alexander Lukashenko, in power since 1994 and Europe’s longest-serving leader.

Belarus has “unilaterally” freed an American woman from detention, U.S. Secretary of State Marco Rubio announced Sunday, as the Kremlin-allied country held an orchestrated election poised to give strongman President Alexander Lukashenko yet another term on top of his three decades in power.

Europe’s longest-serving leader won re-election in a contest widely believe to have been rigged. The result cements the power of a leader whose country is considered Russia’s staunchest ally.

Belarusian strongman President Alexander Lukashenko is poised to extend his rule into a fourth decade in a tightly-controlled vote where he faces no opposition.