A federal class action lawsuit has been filed against Oshkosh Corp. and REV Group Inc., two companies with Wisconsin ties, accusing them of working together to fix fire truck prices.

Ann Arbor is hauling some of the country’s biggest fire-truck makers into federal court, accusing them of quietly choking production and jacking up prices on the rigs cities depend on to fight fires.

KANSAS CITY, Mo. — Fire Chief Dennis Rubin has more than 50 years of experience fighting fires and working in big cities like Atlanta, Georgia. But when he took the job as head of the fire department ...