A jackknifed truck on State Route 52 is causing miles of backup, the California Highway Patrol said.
The incident happened at approximately 3:53 p.m. Tuesday when a truck towing a trailer jackknifed and went the wrong way on the freeway.
A Sig alert has been issued for the eastbound lanes of State route 52 at Cuyamaca Street.
It was unclear if there were any injuries.
Check back for updates on this developing story.
