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OCEANSIDE, Calif. — A tractor-trailer truck overturned on northbound Interstate 5 just south of Harbor Drive in Oceanside,  blocking two lanes, the California Highway Patrol reported.

The accident happened at about 7:35 a.m., the CHP said. The overturned truck was blocking the right two lanes of the freeway, the CHP reported. No one was injured in the crash, but traffic is backing up behind the accident scene.

This was the third tractor-trailer accident to clog San Diego County freeways Friday.  Hours earlier, a truck crashed on southbound I-5 near the Del Mar Fairgrounds, and another big rig crashed on northbound Interstate 805 in Chula Vista.