Victims of the 1984 Bhopal disaster held rallies in India on Saturday to mark the tragedy’s 27th anniversary. On December 3, 1984, around 40 metric tons of toxic gases leaked from a Union Carbide plant in Bhopal. The official death toll stands at around 3,500, but campaigners estimate the actual number is closer to 25,000, with many people still suffering. Union Carbide is now owned by Dow Chemical. To mark the anniversary, thousands gathered in Bhopal to call on the Indian government to boycott the 2012 Olympic Games in London because Dow Chemical is an official sponsor. Activists also blocked railway tracks to protest the ongoing denial of compensation payments to victims despite a $148 million plan unveiled earlier this year.