An American labor-rights group and the United Steelworkers union have filed a suit in the United States that accuses Coca-Cola and some bottlers here of using a right-wing paramilitary group to intimidate and, in some cases, assassinate labor organizers. Coca-Cola adamantly rejected the accusations on Monday.

Along with one of the three bottlers cited in the suit, the soft-drink giant said the company and its affiliates abided by the laws of Colombia and other countries.

''We adhere to the highest standards of ethical conduct and business practices and we require all of our companies, operating units and suppliers to abide by the laws and regulations in the countries that they do business,'' said Natalie Rule, a spokeswoman for Coca-Cola in Atlanta.

Juan Carlos Domínguez, a spokesman for Panamco Industrial de Gaseosas, the major Coke bottler in Colombia, said his company was considering legal action against the plaintiffs. ''Their purpose is to give out false information,'' Mr. Domínguez said in a telephone interview. ''They are trying to tie us to groups that operate at the margin of the law.''