Immigration raids Friday led to the arrests of dozens of people and caused hours of chaos in downtown L.A. Here is what we know so far.

A local immigrant rights organization said more than 45 people were detained in the operations, which were described as “random sweeps.”

After federal immigration authorities arrested more than 40 people Friday across Los Angeles, protesters gathered outside a federal detention center demanding their release before police in riot gear tossed tear gas canisters to disperse the crowd.