The death toll from Kenya’s anti-government protests on Monday has surged to 31, marking the highest single-day toll since the demonstrations began earlier this year, the state-funded human rights commission said Tuesday.

Simmering anger against President William Ruto’s government has boiled over into clashes between protesters and the police, who have deployed live rounds, tear gas and water cannons.

The protests mark the 35th anniversary of the 1990 Saba Saba uprising, when sections of the bourgeois opposition led demonstrations demanding multiparty elections and an end to the Western-backed rule of then-president Daniel arap Moi,