Authorities say one person was shot and critically wounded and seven people arrested early Sunday morning as police used smoke and tear gas to enforce a curfew in the U.S. town of Ferguson, Missouri.
Missouri Police Use Smoke, Tear Gas on Protesters

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Civil rights leader Rev. Al Sharpton speaks to a community gathering at Greater St. Mark Family Church in Ferguson, Missouri, August 17, 2014.

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A van drives past piles of wrapped garbage blocking a newly-opened road in the town of Jdeideh northeast of Beirut, Lebanon.

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Law enforcement officers wait to advance, Aug. 17, 2014, after firing tear gas to disperse a crowd in Ferguson.

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Protesters gesture as they stand in a street in defiance of a midnight curfew in Ferguson, Missouri, Aug. 17, 2014.