The U.S. Citizenship & Immigration Services (USCIS) was formerly a part of the Immigration & Naturalization Service (INS). When the Department of Homeland Security (DHS) came into being in March 2003, the INS was divided into several components and placed under DHS. USCIS is the component that provides immigration benefits.
For additional information – please visit: https://www.uscis.gov/about-us/find-a-uscis-office/international-offices/india-uscis-new-delhi-field-office