A mother-son duo died in Khulna's Batiaghata upazila on Monday evening who ate poisonous puffer fish, locally called "potka fish".
If the fish is not cooked properly the toxicity in it still remains. The deceased were identified as Pori Begum, 60, and her son, Jahangir, 36, residents of Mathabhanga village in Batiaghata upazila.
Police confirmed the poor family caught the fish from the Rupsha river and consumed it after cooking.
They both died while undergoing treatment in the hospital.
