An Indian pharma company whose cough syrups were linked to the deaths of 19 children due to poisoning in Uzbekistan allegedly used industrial-grade ingredients, according to a report.

Reuters reported quoting sources that Marion Biotech, a company based in the township of Noida in the northern Indian state of Uttar Pradesh, bought the ingredient propylene glycol (PG) from trader Maya Chemtech India, which only sold industrial-grade materials and not pharmaceutical-grade ingredients.

Last year, India launched an investigation against Marian Biotech and suspended its license after WHO issued a global medical alert for two cough syrups produced by the company.