Fresh crab meat commonly sold in restaurants and grocery stores across the country have been linked to a bacterial outbreak.

The U.S Food and Drug Administration noted in a late outbreak alert on Friday that consumers purchasing crab meat from restaurants or supermarkets are advised to ask where it came from.

The meat in question is sourced from Venezuela and is contaminated with Vibrio parahaemolyticus, a bacterial infection.

Between Maryland, Louisiana, Pennsylvania and DC, 12 people have become sick from eating the contaminated meat. As of July 13, the CDC reported four hospitalizations linked to the product.

Places of business that sell crab meat should not serve or sell fresh crab meat, the FDA advises. It is commonly labeled as “pre-cooked” and comes in plastic tubs. Though it looks normal in color, taste, and smell, Vibrio parahaemolyticus is a nasty sickness.

Common symptoms last several days and include watery diarrhea, nausea, vomiting, abdominal cramping, fever, or chills. Symptoms begin within 24 hours of being exposed.

Younger children and the elderly are at risk of having more complicated symptoms.