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.

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

The FBI confirmed it’s participating in the HSI raids, not just in Los Angeles but nationwide, “as directed by the Attorney General.”