In the previous week, the reserves had surged by USD 1.432 billion to USD 316.311 billion, RBI data showed today.
The foreign currency assets (FCAs), a major constituent of overall reserves, declined by USD 867.4 million to USD 289.954 billion.
FCAs, expressed in dollar terms, include the effect of appreciation and depreciation of non-US currencies such as the euro, pound and yen, held in reserves.
The country's gold reserves, too, dropped by USD 753.2 million to USD 18.985 billion.