The 10 Freeway was closed for hours Thursday morning due to police activity in the Fontana area.
Traffic was backed up for miles on the eastbound side of the freeway from Sierra Avenue. Later Thursday morning, the westbound side of the road was closed.
The freeway was closed east of Los Angeles after reports of a person on the road. Details about why the person was on the freeway were not immediately available.
The freeway reopened around 10 a.m. The person on the freeway was taken into custody, Fontana police said.