A crash involving a jackknifed tractor-trailer and three other vehicles wreaked havoc today on Interstate 5 near the Coronado Bay Bridge and sent one person to the hospital, authorities said.

A SigAlert was issued at 7:09 a.m., shortly after the big rig and three other vehicles blocked all four lanes of northbound I-5 approaching the bridge, the California Highway Patrol reported.

As of 8:10 a.m., all but one lane was reopened but the SigAlert remained in effect, according to the CHP.

Paramedics took one person to Kaiser Permanente Hospital in San Diego, a fire dispatcher said.