Police activity on 10 Freeway sparks major traffic backup in Pomona; All WB lanes closed at SR-57

POMONA, Calif. (KABC) — Law enforcement activity on the 10 Freeway in Pomona brought traffic to a grinding halt on Wednesday evening.

All lanes of the 10 Freeway near SR-57 were closed due to police activity at the overpass, according to California Highway Patrol.

The closure caused a five- to seven-mile delay that stretched all the way to Claremont.

The eastbound lanes later reopened, but the westbound lanes remained blocked due to a traffic hazard, according to CHP.

Traffic was being detoured to the northbound side of SR-57.

In a later update, CHP asked travelers to drive with caution as crews work to clear the roadway/