California Highway Patrol officers arrested a man on suspicion of arson Saturday morning after five separate grass fires broke out along the freeway transition connecting the southbound 405 and westbound 101 in Sherman Oaks, each fire burning to roughly five feet in diameter before firefighters knocked them down. The suspect's identity has not been publicly released, and authorities have not provided further details on a possible motive.
According to CBS Los Angeles, firefighters found the suspect at the scene after the fires were reported, and CHP officers took him into custody. The Los Angeles Fire Department confirmed crews were dispatched to the transition road after the five spot fires were reported, per the outlet's reporting. The California Highway Patrol first received the emergency call reporting a brush fire at the interchange at 8:21 a.m. Saturday. MyNewsLA reported that officers shut down the connector road at 8:36 a.m., while the Los Angeles Times said the road was temporarily shut around 8:40 a.m. as fire crews responded.
LAFD spokesperson Jamie Stewart confirmed that after crews located the five spot fires at the interchange, the department dispatched specialized arson investigators and Park Rangers to assist CHP officers who ultimately took the suspect into custody, MyNewsLA reported. The response drew together CHP, LAFD suppression crews, and fire investigators in a rapid multi-agency effort at one of the region's most heavily traveled points of pavement.
A Second Fire at the Same Spot in Less Than a Day
The Saturday morning blazes were reported at the 405/101 freeway transition in Sherman Oaks.
Why This Interchange Matters So Much
The 405 and 101 interchange in Sherman Oaks is described by Rep. Brad Sherman's office as the busiest highway interchange in the nation, carrying more than 457,000 vehicles a day. Even small roadside ignitions at that chokepoint carry outsized risk, capable of triggering major traffic gridlock and threatening the wildland-urban interface that borders the corridor.
Under California Penal Code Section 451, intentionally and maliciously setting fire to property, forest land, or structures is a felony, punishable by up to three years in state prison for property, up to six years for forest land or structures, and up to nine years if the fire causes great bodily injury, according to DCD Law. The suspect has not been formally charged, and arson investigators are still finalizing origin-and-cause determinations.
LAFD's Specialized Arson Unit and a History in Sherman Oaks
The Los Angeles Fire Department's Arson/Counter-Terrorism Section, established in 1918, is staffed by sworn peace officers with full arrest powers who specialize in origin-and-cause determination, accelerant-detection K9 handling, and joint investigations with LAPD, CHP, and federal partners, according to the Los Angeles Fire Department. The department lists 3,744 intentional fires, with its arson section investigating 837 cases and clearing 262 by arrest.
Statewide, CAL FIRE law enforcement investigators made 115 arson-related arrests through August 2026. State fire officials estimate arson accounts for 10% to 15% of all wildfires in California annually, according to LAist, with intentional ignitions posing direct hazards to surrounding highways and emergency personnel.
The current Sherman Oaks fire investigation centers on possible arson. Authorities are continuing to investigate the freeway fires described above.
