China has executed two people for their role in the country's worst ever food safety scandal.

The two Chinese dairy suppliers produced and sold tainted infant milk powder that contained melamine, an industrial chemical.   

Melamine is usually used in products like paint, plastic and adhesives. Adding it to watered down milk can make it appear higher in protein and boost profits.

At least six children died from the tainted milk and more than 300,000 children were sickened by the contaminants.