U.S. industrial output hurt by weakness in manufacturing, mining

By Lucia Mutikani WASHINGTON (Reuters) - U.S. industrial production unexpectedly fell in May as manufacturing and mining activity remained weak, a sign that a strong dollar and spending cuts in the energy sector continued to constrain economic growth. "Signs of spring remain largely absent in the industrial sector. The challenges of the stronger dollar and drop in energy prices linger," said Tim Quinlan, an economist at Wells Fargo Securities in Charlotte, North Carolina.