Los Angeles police responded to the building in the 5800 block of West Sunset Boulevard around 4 p.m.
Authorities evacuated the building. AIR7 HD captured footage of people with umbrellas and coats walking off the premises with a police escort.
The property is the home for various entertainment entities such as Netflix and KTLA.
Around 5 p.m., authorities said the suspect was taken into custody.
No further information was immediately available.
The investigation is ongoing.