UPDATE: The right two lanes of northbound I-5 at Grapevine Rd. are still closed after a big fire overnight.

According to the California Highway Patrol, the lanes are expected to reopen at noon. 

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It happened just before midnight when California Highway Patrol reported a semi on its side. CHP also reported a grass fire starting shortly after the semi caught fire. 

CHP says all traffic is stopped just south of Fort Tejon and says the road is expected to be closed for several hours. 

No word if there are any injuries. We have a news crew on the way and will update you as soon as more information becomes available.