By Omar Younis LOS ANGELES (Reuters) -Federal agents in Los Angeles faced off against demonstrators for a second day in a row on Saturday following immigration raids a day earlier, prompting a senior White House official to call the protests a "violent insurrection.

After federal immigration authorities arrested dozens of people across Los Angeles, protesters turned out to demand their release. Police in riot gear responded with tear gas to disperse the demonstrators.

Armed agents in tactical gear threw flash-bang grenades to disperse a crowd in Los Angeles’s Fashion District. Later, agents fired less-than-lethal ammunition at protesters outside a detention center.