Afghanistan's central bank injected 11 million U.S. dollars into the local market in a bid to strengthen the national currency, afghani, Da Afghanistan Bank (DAB) said on Sunday.

The DAB was requesting all eligible banks, foreign exchange and monetary service providers to participate in the auction scheduled on Monday, according to a DAB statement.

"In auction bids, partial settlement of currencies is not allowed and the winners of the auction must deposit to Da Afghanistan Bank their money at one time in cash," the statement said.

The U.S. dollar has depreciated against afghani, compared with a couple of weeks ago. Earlier this week, the DAB conducted auctioning of 13 million dollars.

Since the Taliban's takeover of Afghanistan in mid-August last year, the United States has frozen more than 9 billion U.S. dollars of assets of Afghanistan's central bank and thus undermined the banking system in the war-torn country.