The Philippine government has suspended distribution of seafood believed to be the cause of a hepatitis A outbreak in Hawaii.

According to an order by the Philippines’ Department of Agriculture Bureau of Fisheries and Aquatic Resources, De Oro Resources Inc. must temporarily suspend distribution of its products.

Hawaii’s Department of Health last month identified frozen scallops served raw at a sushi chain as the probable cause. The scallops are produced by De Oro Resources.

Andres Bojos, director of the agriculture bureau in the Central Visayas region, says officials required the company to test workers, including those who shuck scallops and those who work in their plant. He says all of them tested negative for hepatitis A.

The Hawaii outbreak has sickened more than 250 people.