A food poisoning outbreak struck more than 100 students on Sunday night in a high school in Ningbo City, Zhejiang Province, sources said yesterday.

　　All the sick students were from Zhejiang Vocational College of Commerce, which has more than 5,000 students. Two emergency rooms of Ningbo No 2 Hospital and the Women and Children's Hospital were packed with students. They suffered from stomachache, vomiting and diarrhea. Doctors suspect infected food or pesticide residue on vegetables as the cause.