Port Klang, Malaysia (CNN) Malaysia will return 450 tonnes of contaminated plastic waste to the countries that shipped it, in a refusal to become a dumping ground for the world's trash.

Nine shipping containers at Port Klang, west of Kuala Lumpur, on Tuesday were found to contain mislabeled plastic and non-recyclable waste, including a mixture of household and e-waste.

Yeo Bee Yin, minister of energy, science, technology, environment and climate change, said that the US, UK, Canada, Japan, China, Saudi Arabia, Bangladesh, Netherlands, and Singapore should expect waste products to be returned.

Malaysia will return illegally-imported plastic waste to the source country.

Five containers of waste were returned to Spain last month.

On April 24, Malaysia launched a joint task force to crack down on the growing problem of illegal plastic waste imports. The authorities have since carried out 10 operations.

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