Shares in California Pizza Kitchen Inc. lost 5 percent Friday after the company reported an increase in second-quarter earnings but warned that results for the rest of the year would fall short of expectations because of inflated costs.

CPK reported second-quarter income of $6.3 million (21 cents per share), a 5 percent gain from $6 million (20 cents) from the same period a year earlier. The company said that earnings were hit by the rising cost of cheese and expenses related to opening new locations.

Earnings also included 2 cents a share of costs for stopping construction on a CPK/ASAP restaurant, the company’s new fast food-like restaurant.

Sales for the Los Angeles-based casual dinning restaurant operator rose 16 percent to $159 million.

CPK also said it would take a big charge in the current quarter for closing four underperforming restaurants.

Shares in CPK fell to 92 cents, or 4.6 percent to $19.35 in afternoon trading Friday on the Nasdaq.