Sig Alert issued in Ontario

ONTARIO - A big rig in the No. 3 lane has caused traffic to back up on the southbound 15 Freeway at the eastbound 10 Freeway, according to the California Highway Patrol Web site.

CHP officials issued a Sig Alert and closed the No. 3, 4 and 5 lanes of the freeway at 8:33 a.m. The east and westbound transition roads are backed up as well.