WINDHOEK, Namibia — Thirteen members of the same family have died in Namibia after eating porridge that authorities believe became toxic when it was mixed with a fermented substance left over from a homemade alcoholic beverage, the state broadcaster reported. The incident occurred in the Kavango East region in the far northeast part of the country.

The Namibian Broadcasting Corporation said another four people are in critical condition in the hospital. NBC, quoting the Namibian health ministry, said at least 20 people consumed the “poisonous or toxic” porridge after it was mixed with sediment from a homemade beer.

The victims ranged in age from 2 to 33.