France, Oct. 9 -- Mass protests in Madagascar over power cuts, water shortages and alleged corruption have put President Andry Rajoelina under growing pressure, with a youth-led movement giving him until Wednesday night to meet its demands or face a nationwide strike.

The ultimatum was issued by the Gen Z Madagascar collective, which has spearheaded almost two weeks of demonstrations. The group is demanding the removal of Senate president Richard Ravalomanana, a former police general, and investigations into businessman Mamy Ravatomanga, a close ally of the president.

"We reject all attempts at political diversion, notably the appointment of a new prime minister," the collective said in a statement.

It warned that if Rajoelina does not...