NEW YORK, Sept 3 (Reuters) - Two leaders of the U.S.

Consumer Products Safety Commission are calling for the agency

to investigate e-commerce retailers Shein and Temu after "deadly

baby and toddler products" were sold on both websites, according

to a letter posted on the U.S. CPSC website on Tuesday.

U.S. CPSC Commissioners Peter Feldman and Douglas Dziak want

the agency to evaluate how Singapore's Shein, China's Temu and

other foreign-owned e-commerce platforms comply with its rules,

handle relationships with third-party sellers and represent

imported products.

Shein and PDD Group's Temu, which both ship cheap

merchandise into the U.S. from China, are raising "specific

concerns" for the Commission for their use of de minimis, a rule

exempting packages valued at $800 or less from tariffs if they

are sent directly to shoppers.

Critics of Shein and Temu attribute low prices and de

minimis to Shein and Temu's success in the U.S. Both companies

have also come under scrutiny for the quality of their products.

A bipartisan group of U.S. lawmakers last year planned to

introduce a bill to eliminate the de minimis, which is widely

used by e-commerce platforms including third-party sellers on

Amazon.com ( AMZN ) and Walmart.com.