People in Hong Kong who wish to send mail to the United States expressed their frustration at the situation on Wednesday, after the US stopped receiving parcels from mainland China and the SAR.

The United States Postal Service announced on Tuesday that it was temporarily suspending inbound parcels from mainland China and Hong Kong until further notice.

Hongkong Post's website showed postal services regarding packets and parcels to the US were temporarily not available. But people could still mail letters to the country.

A woman at the General Post Office in Central said she was baffled by the arrangement.

"I'm sending a gift to my son in college. They said I can't send a package, I can only send a letter. I'm not happy. I'm going to try SF Express and DHL," she told RTHK.

Another woman said she wanted to send a card and a congratulatory gift after her friend in the US had a baby.

"They weren't sure why, what happened. They just said it's suspended for now. I'm going to find somewhere else and see if I can send it another way," she said.

RTHK reached out to various international shipping companies, and DHL's customer service office said it was still accepting packages to the US.

But the company said guidelines are updated every half an hour and things may change.

FedEx and UPS, meanwhile, said postal services were not affected, but it may take a longer time for parcels to arrive in the US.

The arrangement came after US President Donald Trump imposed an additional 10 percent tariff on Chinese goods, and scrapped a duty-free exemption policy for low-value packages.