More than 80 percent of Wisconsin counties are suing opioid manufacturers for alleged aggressive and fraudulent marketing of painkillers.

Twelve additional counties joined the lawsuit Friday, bringing the total number of Wisconsin counties suing drugmakers to 60. The lawsuit is being led by Milwaukee-based Crueger Dickinson and Simmons Hanly Conroy, a law firm with offices throughout the country.

The counties allege that drug companies pursued a deceptive marketing campaign that's led local governments to spend millions fighting the opioid epidemic. The drug companies, which include Purdue Pharma, deny wrongdoing.