Two leading Republicans on the House Homeland Security Committee on Wednesday raised concerns about security and privacy threats posed by emerging Chinese tech companies, specifically zeroing in on electronics group Xiaomi.

Committee ranking member John Katko (R-N.Y.) and Rep. Andrew Garbarino (R-N.Y.), the top Republican on the panel’s cybersecurity subcommittee, sent a letter to Commerce Secretary Gina Raimondo and Homeland Security Secretary Alejandro Mayorkas highlighting concerns over the increasing Chinese threats in the information technology space.

“The security of our nation’s information and communications technology (ICT) supply chain is critical to nearly every aspect of our lives,” Katko and Garbarino wrote. “Over the past several years, we have seen an alarming increase in threats to our ICT supply chain from the Chinese Communist Party (CCP). They have been engaged in a multi-decade effort to lie, cheat, and steal their way to global dominance, in part by compromising our ICT backbone.”