The US Postal Service on Wednesday morning announced it will continue accepting incoming international parcels from China and Hong Kong — after saying late Tuesday night that it would suspend them. Although no reason was given for the initial suspension of package deliveries from China,

The U.S. has been importing about three million parcels a day with little customs inspection, raising concerns about the ease of sending fentanyl.

The U.S. Postal Service’s decision may block or delay parcels from retailers including Shein and Temu from entering the United States.