BERLIN (AP) — Concerns are growing that Germany’s economy may not rebound as expected in the third quarter, weighing on the already-fragile eurozone, after data Tuesday showed the biggest monthly drop in industrial production in five years.

The 4 percent drop in industrial output in August was far bigger than the 1.5 percent decline expected in markets and the sharpest slide since early 2009. It follows a string of other weak data — a 5.7 percent monthly decline in factory orders in August, led by falling demand for Germany’s exports, as well as a drop in business confidence indicators since the spring.