All lanes of the southbound 710 Freeway were closed at Whittier Boulevard.
The No. 1 lane was reopened around 2:30 p.m. but the rest remained closed for an unknown duration.
CHP was directing traffic to the 60 Freeway.
The victim was identified as a 22-year-old.
DEVELOPING: We will add more details to this report as they become available.
