Federal and state officials are issuing warnings about mysterious packages of seeds that are being delivered to people around the country. The unsolicited packages appear to have originated in China. They contain a sealed packet of unknown seeds, which officials warn should not be planted. In Massachusetts, at least two of the packages have been reported, one in South Hadley and another in Burlington. "While the seeds are not expected to be harmful to humans or pets, they could pose a risk to agriculture. Please do not plant or dispose of the seeds," the Massachusetts Department of Agricultural Resources wrote. According to the Oklahoma Department of Agriculture, Food and Forestry's Facebook page, the seeds are sent in packages usually stating that the contents are jewelry. Officials in Kentucky and Ohio also said they have received several reports of residents getting unsolicited packages in the mail containing unknown types of seeds. The seeds could be invasive plant species, contain noxious weeds, could introduce diseases to local plants or could be harmful to livestock, the Ohio Department of Agriculture said in a release. Invasive species and noxious weeds can displace native plants and increase costs of food production. Kentucky Agriculture Commissioner Ryan Quarles tweeted out a picture of the seeds, saying Kentucky is the fourth known state to report the packages. Quarles said multiple states have opened investigations.Quarles warned residents not to plant the seeds as they could contain invasive species and to put the package and seeds in a zip-close bag and wash your hands immediately.The Ohio Department of Agriculture is warning residents not to plant the seeds and if they come in sealed packaging, to not open the package.Anyone in Massachusetts who receives the seeds is asked to notify the Department of Agricultural Resources through an online form. "Hold on to the seeds and all packaging (including the mailing label), and someone from either USDA or MDAR will be in touch, once we have determined how to facilitate collection and/or disposal of the seeds," the department wrote. WLWT contributed to this report.