The discipline inspection and prosecuting bodies in Haiyang, Shandong province, are investigating administrative authorities after a school canteen was accused by parents on Monday of serving substandard food.

Parents told media that Haiyang Great Talent Experimental School, a privately-funded school, used poor quality meat in meals, while photos provided by parents show moldy steamed buns and rotten tomatoes in the school's kitchen.

More than 100 parents gathered at the school on Monday morning seeking an explanation.