New questions are being raised over the contamination of eggs with insecticide in Belgium, the Netherlands and Germany, with Belgium admitting it knew about the problem in June, a month before it became public. Officials say details were not released because a fraud case had been launched. Katrien Stragier, a spokeswoman for the Belgian Federal Food Agency, told local television: “We’ve known since the beginning of June there’s a problem in the poultry industry with Fipronil.”