Marines deployed to Los Angeles detained a civilian on Friday, the first known incident by active-duty troops since being sent to California by President Donald Trump.

The civilian identified himself as Marcos Leao, 27, according to Reuters, which captured the scene. He said he was an Army veteran going to the Department of Veterans Affairs at the Wilshire Federal Building in the city. On the way, he crossed a yellow tape boundary and was asked to stop. He said he was treated “fairly.”