All lanes of southbound I-5 Freeway blocked for big rig crash in East Los Angeles

All lanes of the southbound I-5 Freeway in East Los Angeles are closed for a big rig crash Monday morning.The California Highway Patrol issued a Sig Alert north of Indiana Street. 

Lanes will be closed for three hours as crews work to clear the roadway, the CHP said.

Traffic is backed up to the I-5 and I-10 Freeway northern split.

Officials urge drivers to use alternate routes and use caution when driving through the area.