Applications for U.S. home mortgages fell last week as interest rates edged up, an industry group said.

The Mortgage Bankers Association said its seasonally adjusted index of mortgage application activity, which includes both refinancing and home purchase demand, declined 4.1 percent in the week ended Sept. 19.

The MBA's seasonally adjusted index of refinancing applications fell 7.0 percent, while the gauge of loan requests for home purchases, a leading indicator of home sales, dipped 0.3 percent.

Fixed 30-year mortgage rates averaged 4.39 percent in the week, the highest since May. They rose 3 basis points from 4.36 percent the week before.

The survey covers over 75 percent of U.S. retail residential mortgage applications, according to MBA.