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.

At least 31 people died and more than 500 were arrested in anti-government protests across Kenya on Monday, the Kenya National Commission on Human Rights (KNCHR) said in a statement on Tuesday.