Yeo said the task force would proceed with inspections in other ports in the country by using the Standard Operating Procedures used in their first phase at Port Klang.
The SCMP report noted that Yeo vowed that even though her country is "small", it "will not be bullied".
According to figures released from Greenpeace, imports of plastic waste in Malaysia totalled 456,000 tons in the first six months of a year ago, compared to 168,500 in the whole of 2016.
Environment minister Yeo Bee Yin said 60 containers stacked with contaminated waste had been smuggled into illegal processing facilities in Malaysia.
Workers open a container full of non-recyclable plastic detained by authorities at the west port in Klang, Malaysia, Tuesday, May 28, 2019.More news: There will be no renegotiation of Brexit deal — European Union tells Britain
Ms Yeo said, 'This is probably just the tip of the iceberg (due) to the banning of plastic waste by China, ' she said.
She said the blame for the dumping of prohibited plastic waste in the country should not be placed exclusively on exporters because it took two to tango.
Five containers of waste were returned to Spain last month.
'We urge the developed countries to review their management of plastic waste and stop shipping the rubbish out to the developing countries, ' she said. Some Southeast Asian countries such as Malaysia had stepped in to fill this gap, but they are now beginning to back away.
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Canadian Environment Minister Catherine McKenna said the Canadian government had awarded a contract to French shipping giant Bollore Logistics Canada that calls for the return of 69 containers filled with household waste and electronic garbage to Canada by the end of June.
Canada says the waste, exported to the Philippines between 2013 and 2014, was a commercial transaction done without government consent.
"The Philippines as an independent sovereign nation must not be treated as trash by a foreign nation", said presidential spokesman Salvador Panelo.
Philippine officials were assessing separate shipments from Hong Kong and Australia which environmental activists said allegedly contained garbage and should be sent back to their points of origin.
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