The Federal Reserve bought $23.22 billion of mortgage-backed securities in the week ended Feb. 11, according to data released Thursday.

Of these, Freddie Mac's (FRE) securities comprised $14.66 billion, Fannie Mae's were (FNM) $7.164 billion and Ginnie Mae's were $1.4 billion.

Last week, the central bank had bought $22.27 billion of these securities.

Most of the Fed's buying was in the 4.5%, 5.5% and 5% coupons.

The central bank expects to buy at least $500 billion by June this year.

In addition, the U.S. Treasury bought $22.5 billion of Fannie and Freddie bonds in January, according to data released Wednesday.

-By Anusha Shrivastava, Dow Jones Newswires; 201-938-2371; anusha.shrivastava@dowjones.com