Dozens of protesters gathered Friday evening outside a federal detention center in Los Angeles after federal immigration authorities arrested at 44 people. (AP video by Jae Hong) Protesters gather at the U.

Approximately 44 people” were administratively arrested ​​and one person was arrested on an obstruction charge, Homeland Security Investigations said.

After a day of contention and little information about the nature of an immigration enforcement operation in Los Angeles, the Department of Homeland Security has finally released details about the joint operation conducted Friday morning.