Last day of voting in Russia, opposition to Putin calls for massive mobilization. Russians vote on Sunday for the last day of an election supposed to keep Vladimir Putin at the head of the Kremlin for six more years.

Critics of the Russian president, who has been in charge of the country for 24 years, will nevertheless try to make themselves heard. Initial estimates and the results of a survey by a state institute, Vtsiom, should be known shortly after the closing of the last polling stations at 7 p.m. GMT.