UPDATE: All lanes opened on I-10 eastbound in St. Martin Parish

UPDATE: The clean-up following a TRIPLE 18-wheeler crash on I-10 eastbound at mm 126 in St. Martin Parish will last approxiamately 1 hour, according to State Police.  The traffic back-up is now at 10 miles, police said. Continue to avoid the area.

ORIGINAL: State Police tell News 10 that the eastbound lanes on I-10 have been reduced to one lane from a crash involving three 18-wheelers. 

Police say it happened shortly after 2 p.m. on the eastbound lanes of Interstate 10 at MM 126.

Traffic is backed up for at least 10 miles, police report. 

The cause of the crash remains unclear, according to police.

No injuries have been reported.