A Denver-based cannabis company is voluntarily recalling their products after samples showed they could contain residual levels of illegal pesticides.

The Colorado city’s environmental health department is probing whether Green Man Cannabis’ products were exposed to unsafe pesticides, according to the Denverite.

The Colorado Department of Agriculture is investigating whether marijuana and marijuana-infused products grown by the company had residual levels of pesticides that are not allowed. A final decision has not been made,” wrote department spokeswoman Christi Lightcap in an email.

There have been no reports of illness so far.

The company operate two storefront locations in Denver and is both a grower and seller of recreational and medical cannabis. It isn’t clear whether the recall involved adult-use or medical cannabis, or both.

At least a dozen companies implemented pesticide-related recalls in 2016, according to the city of Denver’s website.