Senegal’s former Prime Minister Ousmane Sonko, who was dramatically sacked on Friday by the president, has been elected Speaker of the national parliament setting up a possible source of conflict at the top of Senegalese politics.

According to the BBC, the West African nation’s current crisis follows months of tension between Sonko and his one-time ally President Bassirou Diomaye Faye.

Parliament’s previous Speaker stepped down on Sunday to make way for the former prime minister, who is a popular figure and whose Pastef party has a majority of the seats in the National Assembly.

On Monday, Faye appointed economist Ahmadou Al Aminou Lo to replace Sonko as prime minister.