The heads of two U.S. Senate committees that oversee national security have expressed concern to the Obama administration over news reports that Chinas Huawei Technologies Co Ltd has been chosen to build a nationwide wireless network in South Korea. According to press reports, Huawei has been selected as a subcontractor for LG U+ – a Korean subsidiary of LG Corp – in its plans to build a nationwide broadband network in South Korea. Democratic Senators Robert Menendez, the chairman of the Senate Foreign Relations Committee, and Dianne Feinstein, chairwoman of the Senate Intelligence Committee, said the reports raised concerns in light of the close security alliance between the United States and South Korea.