Mexico City, Apr 8 (EFE).- Seven Grupo Modelo workers died over the weekend while doing maintenance work at a brewery in Mexico City, a company spokesman said.
The accident occurred Sunday "in a confined area at the Modelo brewery in Mexico City in a tank that was undergoing cleaning and maintenance work," Grupo Modelo spokesman Francisco Javier Lopez Bravo said.
The brewery is located in the Anahuac neighborhood of the northwest Mexico City borough of Miguel Hidalgo.
"We are conducting an investigation to determine the cause of the accident," Lopez Bravo said.
The workers may have been killed by an accumulation of carbon dioxide gas during cleaning operations, the Reforma newspaper reported on its Web site.
"Cerveceria Modelo deeply regrets this incident and will provide support at all times to the affected families," Lopez Bravo said.
Grupo Modelo, founded in 1925, is Mexico's leading beer producer and exporter.
The company operates seven breweries in Mexico with the capacity to produce 71.5 million hectoliters (1.8 billion gallons) annually.
Grupo Modelo owns 14 brands, including Corona Extra, the beer with the largest market share in the world.
The Mexican brewer exports its products to 180 countries and is the exclusive importer of Budweiser and other Anheuser-Busch Inbev brands in Mexico.