From the Department of Homeland Security:
Many countries now require biometric data from individuals filing visa applications. Several international allies have partnered with USCIS to collect the requisite biometrics and limited biographical information on behalf of their countries. USCIS will collect biometric and biographical information and delete the records immediately after it receives confirmation that the partnering country has received the information. USCIS is conducting this PIA to discuss the privacy risks and mitigations associated with processing information on behalf of another country. July 22, 2013