The ripple effects of the Brussels bombings have already made their way to Hollywood.
LAPD sources tell us ... the department is securing iconic landmarks all over the city, including Hollywood and Highland -- the site of the Oscars and other productions.
The Grove -- the landmark L.A. mall -- is also being fortified.
Of course, LAX -- which has been a target in the past -- has also ramped up security.
Ditto Disneyland and Magic Mountain.