US lawmakers urge tech CEOs to address undersea cable security concerns

The letter raised concerns that entities affiliated with China, "such as SBSS, Huawei Marine, China Telecom, and China Unicom, have continued to provide maintenance or servicing to cable systems in which your companies maintain direct or indirect operational involvement or ownership." The letter was signed by Representative John Moolenaar, who chairs a House panel on China, and also by Republican representatives Carlos Gimenez and Keith Self, who chair subcommittees.

The Chinese embassy in Washington did not immediately comment.

The tech companies did not immediately respond to requests for comment.