OCEAN CITY, Md. (AP) — Ocean City officials are warning pedestrians to avoid sea grass that has washed ashore.

Ocean City police spokeswoman Lindsay Richard tells local media that public works crews and the state Department of Natural Resources are working to clear the grass, which appeared on Wednesday. Mounds of the grass can be found from Ocean City to the Delaware state line.

Sea grass, also called phragmite, can contain debris and other sea life hidden in it, so people are advised not to walk in it.