The World Health Organization (WHO) has issued a global health alert after identifying three contaminated cough syrups manufactured in India, warning that the products pose serious health risks, particularly to children.

According to the WHO, the affected medicines include Coldrif by Sresan Pharmaceutical, Respifresh TR by Rednex Pharmaceuticals, and ReLife by Shape Pharma. Tests revealed that the syrups contained dangerously high levels of diethylene glycol, a toxic chemical found at nearly 500 times above the safe limit.

The contaminated products were linked to the deaths of several children under the age of five in Chhindwara district, in India’s central state of Madhya Pradesh, the WHO said.

India’s Central Drugs Standard Control Organization (CDSCO) reported that none of the affected cough syrups were exported and that there is currently no evidence of illegal distribution beyond India’s borders.

The U.S. Food and Drug Administration (FDA) also confirmed that these products have not been imported or sold in the United States.

WHO has urged health authorities worldwide to remain vigilant and to immediately report any detection of the contaminated syrups to the organization.