The U.S. Coast Guard said Monday it is imposing a temporary security zone in the waters off Surfside Beach, South Carolina in the area where the U.S. military on Saturday shot down a suspected Chinese spy balloon.

The 10 nautical mile area security zone blocks vessels from entering without permission of the Coast Guard and is intended to protect the public “from potential hazards associated with physical objects.” The zone is to be enforced through Feb. 18.