Lawmakers are warning U.S. companies not to do business with two of the world's largest telecommunications equipment makers. The U.S. House of Representatives Intelligence Committee released a report Monday after an 11-month investigation about the business practices of Huawei Technologies and ZTE Corp, Chinese firms that develop and sell telecom communications equipment like routers, handsets and switches. The report recommends that Huawei and ZTE be excluded from expanding their businesses in the U.S. because of cyber espionage risk and connections to the Chinese government.

Committee members said neither Huawei nor ZTE provided ample documents or detailed information to "ameliorate the committee's concerns" about their formal relationships and interaction with Chinese authorities. The investigation determined that Huawei and ZTE present risks to critical U.S. infrastructure that "could undermine core U.S. national-security interests" and therefore the U.S. "should view with suspicion the continued penetration of the U.S. telecommunications market by Chinese telecommunications companies."