Authorities closed a stretch of the 210 Freeway in Sylmar on Tuesday afternoon after reports of a possible shooting prompted a large-scale police response and caused major traffic disruption across the Los Angeles-area roadway.

According to early information from officials and traffic reports, emergency calls were received shortly after midday indicating a potential shooting along the eastbound lanes near Sylmar. California Highway Patrol (CHP) officers quickly responded to the scene and shut down multiple lanes as a precaution while they worked to secure the area and assess what had occurred.

The closure led to immediate and widespread traffic delays, with vehicles brought to a standstill and backups stretching for miles in both directions in some sections. Drivers reported sudden congestion as law enforcement diverted traffic off the freeway, directing motorists to exit at nearby ramps or turn around where possible to reduce pressure near the scene.

At this time, authorities have not released confirmed details about the incident, including whether anyone was injured or how many individuals may have been involved. It also remains unclear whether a suspect has been identified or taken into custody.

CHP officers and local law enforcement agencies, including the Los Angeles Police Department, were observed working together at the location. Aerial support was also reportedly used to monitor the area from above, while paramedics were placed on standby as a precaution.

As the investigation continued, officials expanded the freeway closure to allow emergency personnel to safely examine the roadway. Investigators were seen documenting the scene, inspecting vehicles in the affected area, and speaking with witnesses who were on the freeway at the time of the reported incident.

The 210 Freeway serves as a key commuter route through the San Fernando Valley and toward the Inland Empire, and the shutdown caused significant delays during a busy travel period. Traffic management alerts advised drivers to avoid the area entirely and use alternative routes such as the 118 Freeway and surrounding surface streets, which quickly became congested as traffic was rerouted.

Authorities have urged the public to avoid speculation as the investigation remains active and details continue to emerge. Officials say the situation is still being evaluated, and it is not yet clear whether the incident was isolated or connected to additional suspects or vehicles.

Further updates are expected as investigators gather more information and begin reopening portions of the freeway once it is deemed safe.