The findings, announced by WHO Director-General Tedros Adhanom Ghebreyesus, followed tests on several medicinal syrups that were suspected of causing 66 child deaths in the small West African country.

Tedros told reporters that the UN agency was conducting an investigation with Indian regulators and the company that made the syrups, New Delhi-based Maiden Pharmaceuticals Ltd.

Maiden Pharmaceuticals declined to comment, while calls and messages to the Drugs Controller General of India went unanswered.

The WHO issued a medical product alert on Wednesday asking regulators to remove Maiden Pharmaceuticals Ltd goods from the market.

"The products may have been distributed elsewhere through informal markets, but had so far been identified only in Gambia," the WHO said in its alert.

The alert covers four products: Promethazine Oral Solution, Kofexmalin Baby Cough Syrup, Makoff Baby Cough Syrup and Magrip N Cold Syrup.

Lab analysis confirmed “unacceptable” amounts of diethylene glycol and ethylene glycol, which can be toxic and lead to acute kidney injury, the WHO said.

Medical officers in Gambia raised the alarm in July, after dozens of children began falling ill with kidney problems. The deaths confounded medics before a pattern emerged: dozens of patients younger than five were falling ill three to five days after taking a locally sold paracetamol syrup.

Gambia’s director of health services, Mustapha Bittaye, said similar problems have been detected in other syrups but that the ministry is awaiting confirmation of the results.

He said the number of deaths has tapered off in recent weeks and that the sale of products made by Maiden Pharmaceuticals was banned. However, until recently, some of the syrups were still being sold in private clinics and in hospitals, he said.

Gambia’s Medicines Control Agency sent a letter on Tuesday to health professionals ordering them to stop selling any of the products listed by WHO.

Maiden Pharmaceuticals manufactures medicines at its facilities in India, which it then sells domestically as well as exporting them to countries in Asia, Africa and Latin America, according to its website.

That some of the medicines listed by the World Health Organization (WHO) are still being sold by some private hospitals and chemist, a great danger is still likely in the tiny West African Country.