A massive fire broke out at the Universal Studios in Los Angeles early on Sunday, according to reports.

US broadcaster CNN reported that the blaze raged through several buildings at the film studio and had also caused an explosion.

There were, however, no reports of injuries. CNN showed images of firefighters battling the flames with heavy equipment. Thick black smoke was visible.

Around 100 firefighters and two helicopters were being used. The cause of the fire was not yet known.