WASHINGTON (AP) _ Mortgage rates fell this week with 30-year mortgages dropping to their lowest level since April.

The average interest rate on 30-year fixed-rate mortgages declined to 8.13 percent for the week ending July 28, compared with 8.21 percent the previous week, according to a survey released Thursday by Freddie Mac, the mortgage company.

In mid May, rates on 30-year mortgages hit a five-year high of 8.64 percent.

Fifteen-year mortgages, a popular option for refinancing, also fell this week, dropping to 7.85 percent, down from 7.93 percent the previous week.

On one-year adjustable-rate mortgages, lenders were asking an average initial rate of 7.29 percent, down from last week's rate of 7.32 percent.

The rates do not include add-on fees known as points, which averaged at or just over 1 percent of the loan amount for all three types of mortgages.