A spokesman for the State Food and Drug Administration said Thursday that improper production is probably the cause of the problematic antibiotic injection, which had allegedly led to six deaths in China.

The spokesman said the "Xinfu" antibiotic injection, manufactured by Anhui Huayuan Worldbest Biology Pharmacy Co., a subsidiary of Shanghai Worldbest Co. Ltd., was not produced in accordance with required technical procedures.

Source: Xinhua