Aug. 18 (UPI) -- The Consumer Product Safety Commission on Monday issued an "urgent safety warning" about knockoff Labubu dolls that "pose a serious risk of choking and death to young children."

The phony ones are sold as plush figures and plush keychains, the CPSC said.

The popular dolls, made by the Chinese seller Pop Mart, are inspired by characters from a book, The Monsters Trilogy, by Hong Kong artist Kasing Lung.

The dolls, which retails for about $30, are sold in mystery boxes and come in hundreds of varieties. Some rare ones are being sold for thousands of dollars online, CBS News reported.

CPSC said investigators have identified shipments of the lookalikes attempting U.S. entry from China. They seized thousands of units after confirming violation of federal regulations regarding toys with small parts.