CONCORD, N.H. (AP) – The Red Tide is sweeping through New Hampshire’s coastal waters again.

State officials have banned taking mussels, clams and oysters from New Hampshire’s coastal waters and Hampton/Seabrook Harbor. The ban is in response to high levels of Paralytic Shellfish Poisoning, known as the Red Tide, found in blue mussels collected from the Isles of Shoals and the harbor.

State shellfish manager Chris Nash says it’s too soon to know how long the ban will last.

People who eat contaminated shellfish can get sick or die.