Story highlights Laurent Lamothe says he is stepping down as prime minister

Protesters have called for the resignations of Lamothe and President Michel Martelly

Haiti has been mired in extreme poverty and instability for years

(CNN) After days of anti-government protests in Haiti, the country's prime minister is resigning.

Laurent Lamothe announced his resignation Saturday night, the country's Ministry of Communications said on Twitter.

"I leave the position of prime minister this evening with a feeling of accomplishment," Lamothe said in a televised speech

The resignation comes after violent anti-government protests calling for elections and for both Lamothe and President Michel Martelly to step down.

The United Nations Stabilization Mission in Haiti denounced the violence in the nation's capital, Port-au-Prince, and also said it is investigating a report of excessive use of force.

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