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SINGAPORE, Jan 21 (Reuters) - Indian refiner Mangalore Refinery and Petrochemical Ltd issued its first crude import tender in more than a year, seeking up to 2 million barrels of oil to be delivered next month, a tender notice from the company showed.

Indian refiners are increasing crude purchases from the spot markets after Washington last Friday announced sweeping sanctions targeting Russian producers and tankers, disrupting supply from the world's No. 2 producer and tightening ship availability.

The refiner is seeking offers of crude of 1 million or 2 million barrels on a cost and freight (C&F) or a delivered at port (DAP) basis to be delivered on Feb. 16-28.

It did not specify which crude grades it sought, but sources said the refiner is open to offers of both sweet and sour crude.

The tender will close on Jan. 23 with bids valid on the same day.

MRPL's request to buy prompt cargo comes after top refiner Indian Oil Corp purchased 7 million barrels of Middle Eastern and African crude via tenders.

Separately, Indian state refiners have asked Abu Dhabi National Oil Co $(ADNOC.AU)$ to offer pricing of its crude on a delivered basis to manage costs, three refining sources said on Monday.

(Reporting by Nidhi Verma and Florence Tan; Editing by Himani Sarkar and Janane Venkatraman)

((Florence.Tan@thomsonreuters.com; Reuters Messaging: florence.tan.thomsonreuters.com@reuters.net))