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SAN DIEGO — A crane moving concrete barriers on a South Park freeway ramp toppled over early today, seriously injuring a laborer and leaving traffic lanes in the area blocked for hours.

The accident on the connector between southbound state Route 15 and westbound SR-94 occurred shortly before 1 a.m., according to the California Highway Patrol and the San Diego Fire-Rescue Department.

The victim wound up pinned between two safety barricades known as K- rails, SDFRD Capt. Joe Amador said. Co-workers were able to free the man prior to the arrival of emergency crews.

Medics took the worker to Scripps Mercy Hospital in Hillcrest for treatment of a severe leg injury.

A second crane was brought in to right the one that had fallen, Amador said.

All lanes were open again at the accident site by shortly before 6 a.m., the CHP reported.