WASHINGTON (AP) — Sales of existing homes rose in July, surpassing expectations, as buyers snapped up deeply discounted properties in parts of the US hit hardest by the housing bust.

However, the number of unsold properties hit an all-time high, the latest indication that the worst housing slump in decades is far from over. Prices nationwide are not expected to hit bottom until early next year.

The National Association of Realtors reported yesterday that sales rose 3.1 percent to a seasonally adjusted annual rate of five million units, up from June's downwardly revised rate of 4.85 million units. Sales had been expected to rise by only 1.6 percent, according to economists surveyed by Thomson/IFR.

"The process of a recovery has begun," said Joel Naroff, president of Naroff Economic Advisors. "It's not going to be short and swift, but it's begun nonetheless."

Home sales were about 13 percent lower than a year ago and prices were down dramatically. The median price for a home sold in July dropped to $212,000, down by 7.1 percent from a year ago.

Despite the third monthly sales increase this year, the number of unsold single-family homes and condominiums rose to 4.67 million, the highest number since 1968, when the Realtors group started tracking the data.

That represented a 11.2-month supply at the July sales pace, matching the all-time high set in April.