BATON ROUGE — The two lanes on the westbound side of the Mississippi River Bridge were blocked Sunday evening, causing miles of traffic in Baton Rouge. 

Shortly after 4 p.m. traffic started building up following a reported crash. An hour later, cars were backed up to the I-10/I-12 merge. Around 5:45 p.m., the lanes had opened and traffic was flowing normally. 

No information about the crash was immediately available.