WASHINGTON (MarketWatch) — U.S. home prices continued to accelerate in May, with Dallas and Denver reaching record levels, according to data released Tuesday.

A sale sign sits outside a home in Dallas in 2009. Prices in Dallas have now surpassed prerecession levels. Reuters

The S&P/Case-Shiller 20-city composite jumped 2.4% in May to take the year-on-year increase to 12.2%.

Prices in each of the 20 cities rose by at least 1.2%, and San Francisco saw a monthly pop of 4.3%.