Four asylum seekers were detained by federal agents on Tuesday at San Francisco Immigration Court, a move the Department of Homeland Security has portrayed as part of a broader return to "the rule of law" but that immigration attorneys have called unconstitutional and unprecedented in U.

Immigrant rights advocates rallied at immigration courthouses in San Francisco and Sacramento on Wednesday to show their outrage over the Trump administration's arrests of people seeking asylum.

Federal agents Tuesday morning detained at least four people at a San Francisco courthouse and drove them away from the scene in a DHS vehicle.