Four were later rescued and taken to shore, officials said.
An estimated 75,000 people marched at the weekend in the capital Port Louis, many dressed in black and demanding answers from the government in the biggest public demonstration in 40 years.
Mauritius and its 1.3 million inhabitants depend crucially on the sea for food and ecotourism. presidential race. Police used smoke grenades and pepper balls to control the crowd of protesters. Police acknowledged in a statement that officers "deployed some crowd control munitions" and said 19 people were arrested, mostly on charges of disorderly conduct and interfering with police. president tax returns in connection with a criminal probe of his business practices. Trump has spent a year fighting a grand jury subpoena from District Attorney Cyrus Vance to the president longtime accounting firm Mazars USA, for eight years of Trump personal and corporate returns.
The spill was declared an ecological disaster for the Indian Ocean archipelago, and a massive clean up operation was launched to scrub the pristine coastline and azure seas of thick sludge.
"We are doing everything we can to locate them, with all our means and with the help of fishermen in the area. On behalf of the government, I extend my sympathies to the family."