A fire has broken out at the border of Los Angeles and Ventura counties and is spreading rapidly, threatening numerous hillside homes in the Calabasas and Hidden Hills areas.

Jan. 9, 8:35 p.m. The Kenneth Fire that erupted Thursday afternoon on the border between Los Angeles and Ventura counties is reportedly being investigated as an arson case, with one person in custody.

KTLA 5 News team coverage of the Kenneth Fire in the area of Calabasas and West Hills. Jan. 9, 2025. Updates: https://ktla.com/news/california/wildfires/fast-moving-wildfire-explodes-in-calabasas/

The arrest occurred around 4:30 p.m. on Ybarra Road, just south of the fire’s origin, after local residents reportedly spotted the suspect attempting to ignite a blaze. The residents detained him until police arrived, with photos shared on the Citizen app showing officers surrounding the scene where the man was taken into custody.

A possible arson suspect was arrested Thursday night near the Kenneth Fire area as fire crews continue battling flames burning near homes in Calabasas and West Hills. At around 4:30 p.m., Los Angeles police responded to reports of a man attempting to light a fire in the 21700 block of Ybarra Road in Woodland Hills.

The latest fire in Los Angeles is being investigated as a potential arson attack, according to NBC. The blaze, known as the Kenneth Fire, is burning in the city's West Hills area with zero per cent containment as it spreads across nearly 400 hectares.