India's industrial production fell an unexpected 0.6 percent in December from a year earlier weighed down by manufacturing, government data showed on Tuesday, extending a period of gloom in Asia's-third largest economy.
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Analysts polled by Reuters had expected output to grow 1.1 percent annually.
Manufacturing, which constitutes about 76 percent of industrial production, fell 0.7 percent from a year earlier, the federal statistics office said.
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In the April-December period, industrial production expanded an annual 0.7 percent.