BERLIN (AP) — Europe's largest automaker Volkswagen AG is reporting a 13.7 percent increase in June passenger vehicle sales, with booming results outside western Europe where the debt crisis slowed spending.

The Wolfsburg-based company said Tuesday that June sales rose to 498,600 cars from 438,400 in June 2011.

Half year sales were up 10.2 percent to 2.79 million vehicles delivered.

In the first six months, sales were up in North America by 24.2 percent to 295,300, 15 percent in the Asia-Pacific region to 1.09 million vehicles, and 45.2 percent in eastern Europe to 134,000.

Western European sales, excluding Germany, for the half year slipped 4.7 percent to 464,300 vehicles, while German sales rose only 2.6 percent to 309,700.

Volkswagen is warning of "considerable uncertainty" in Europe ahead in the second half.