The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

Days of demonstrations against federal immigration raids in Los Angeles have fueled round-the-clock news coverage and a number of misleading social media posts, including unrelated videos being mislabeled or shared out of context.

A Department of Homeland Security request for 21,000 National Guard troops to support "expansive interior immigration enforcement operations" includes a call for troops to search for unaccompanied children in some cases.

U.S. immigration authorities have extended activity in Los Angeles area in the wake of protests at an federal detention facility and a police response that included tear gas, flash-bangs and the arrest of a union leader.

Police arrested more than 20 people, mostly on curfew violations, on the first night of restrictions in downtown Los Angeles