Panasonic Corp. has decided to halt the supply of some components to Huawei Technologies Co., officials said Thursday, the latest sign that last week's U.S. blacklisting of the Chinese telecoms giant is affecting major Japanese firms.

Panasonic is still examining which product shipments run counter to the economic sanctions imposed on Huawei by the United States. Even when produced outside the United States, some Japanese components that incorporate U.S.-made materials and technology before being shipped to Huawei could infringe the ban.

Impacts from the sanctions may spread to other Japanese manufacturers whose parts are used to assemble Huawei smartphones.