The Federal Reserve says factory production rose 0.6 percent in April, erasing a 0.5 percent decline in March.
Half of the April increase reflected a 3.9 percent jump in the production of motor vehicles and parts. That's the fifth consecutive gain at auto plants and the biggest rise since January.
Overall industrial production increased 1.1 percent in April. In addition to the big gain at factories, output at mines and utilities both showed strong gains in April.
Factory output has risen 18.3 percent since it hit a low in June 2009, the month the recession ended.