The Fire Department received reports of the explosion about 4:20 p.m. near Ridge Route Road and Pine Crest Place. There were no injuries, said Fire Captain Brian Kight.
CHP closed all lanes of the 5 Freeway at 5:12 p.m. for an unknown duration.
(KNN.NEWS)
The shelter-in-place order, issued at 5:40 p.m., spans much of Castaic and advises residents to close all doors, windows and vents, and shut off HVAC systems.
By 6 p.m., the gas company had shut off both sides of the gas line, but firefighters and a hazmat task force continued to respond to a residual leak.
The cause of the explosion is unknown.
This is a developing story and will be updated.
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