A large fire is burning at Universal Studios in Los Angeles, California.
The blaze was reported before dawn on Sunday on a sound stage at the film studios, Los Angeles fire captain Frank Reynoso told AP news agency.
About 100 city and county firefighters are helping studio staff tackle the flames, which have caused at least one explosion, he said.
No injuries have been reported at the 230-acre site, which saw filming for such films as Jurassic Park and ET.
Helicopters have been dropping water on to the burning structures and television pictures showed flames leaping into the air as a thick cloud of smoke covered the world-famous site.
Behind-the-scenes tours of the studios are a long-established tradition still popular with visitors today.