Bean sprouts remain  the focus of a hunt for the cause of a toxic E coli bacteria outbreak in Germany, Consumer Affairs Minister Ilse Aigner said Wednesday after a crisis summit.

Aigner said the Biogaertnerhof market garden remained under suspicion because its products had been eaten by so many EHEC victims. Two more groups of patients had been identified Wednesday whose diet had included Biogaertnerhof vegetable sprouts.

Health Minister Daniel Bahr said an official warning to Germans against eating any raw lettuce, tomatoes, cucumbers or sprouts remained in place until the source was confirmed.