Interstate 680 was briefly shut down Monday morning due to horses on the freeway in Walnut Creek.
The horses were reported at around 7:38 a.m. on northbound I-680 at Castle Crest Road, according to the California Highway Patrol.
Authorities have rounded up the horses and the lanes were opened by 8:30 a.m.
They apparently broke through a fence at a nearby house and got out.