Getty Images on Monday confirmed the arrest of one of its photographers covering unrest in a Missouri town where a white police officer shot dead an unarmed black teenager.
In a caption with a photograph showing the arrest of Scott Olson, the agency said he was being "placed in a paddy wagon after being arrested by police as he covers the demonstration following the shooting death of Michael Brown."
Getty Images did not say why Olson was detained.
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The dispute has fueled resentment in Ferguson, a suburb of St Louis with a majority African American population but a mainly white police force -- now backed by a detachment of National Guard soldiers.
Earlier, President Barack Obama said attorney general Eric Holder would travel to Ferguson on Wednesday to meet with FBI agents and Justice Department officials conducting a federal civil rights probe into the shooting that has revived the nation debate on race relations.