LONG BEACH (CBSLA.com) — Police Wednesday investigated a traffic collision involving three tractor trailers in Long Beach.

The crash occurred just after 12:30 a.m. in the southbound lanes of the 710 freeway, located at the northbound 405 Freeway connector, according to California Highway Patrol officers.

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Upon their arrival, paramedics transported two people to a hospital for treatment of injuries sustained in the crash.

Hospital officials reported one of the victims sustained critical injuries.

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A preliminary investigation revealed the incident resulted from a chain reaction crash in which the second big rig was jack-knifed on the freeway.

All southbound lanes of the 710 Freeway remained closed until just before 8 a.m. due to a diesel spill, officials said.

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The cause of the crash remains under investigation.