India, May 17 -- Amazon.com Inc was sued on Friday by consumers seeking refunds for costs passed on to them in the form of higher prices as a result of tariffs the U.S. Supreme Court later concluded had been unlawfully imposed by President Donald Trump.

Consumers in a proposed class action filed in federal court in Seattle alleged that the e-commerce giant collected hundreds of millions of dollars in unlawful tariff costs by raising prices on imported goods before the Supreme Court had ruled.

The U.S. Supreme Court in February concluded in a 6-3 decision that Trump overstepped his authority by using the International Emergency Economic Powers Act to impose his sweeping tariffs.

Thousands of companies have begun to seek billions of doll...