The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

A volley of court rulings has made the legal path unclear in a case challenging President Trump’s use of troops in Los Angeles. For now, the president has retained control of the state militia.

The deployment was the first by a president of a state National Guard without the governor’s permission since 1965.