US President Donald Trump said that Chinese-made smartphones and other electronics will not be exempt from tariffs - adding they are simply moving into a different levy "bucket".
European stock markets bounced up on Monday morning after Friday's official announcement that some of these products would escape levies of up to 145 percent, BBC reported.
Meanwhile, China has called on Donald Trump to "completely cancel" his tariffs regime, and "return to the right path of mutual respect".
However US officials said on Sunday that products would be subject to a "semiconductor tariff" instead, with Trump expected to reveal more details later.
US Commerce Secretary Howard Lutnick said the new levy would be in addition to a host of global tariffs the US imposed earlier this month, then paused for 90 days.
"We need our medicines and we need semiconductors and our electronics to be built in America," he added.
On Saturday, a US customs notice revealed smartphones, computers and some other electronic devices would be excluded from the 125 percent tariff on goods entering the country from China.
But Trump chimed in on social media, saying there was no exemption for these products and called such reports about this notice false. Instead, he said that "they are just moving to a different Tariff 'bucket'".
Trump added: "We are taking a look at Semiconductors and the WHOLE ELECTRONICS SUPPLY CHAIN in the upcoming National Security Tariff Investigations."
He said he would provide an update on Monday about semiconductor duties.
Everyday devices such as smartphones and laptops rely on semiconductors, which are small and powerful pieces of tech that form the basic building blocks of modern computation.
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