Afternoon accident in Modesto backs up Highway 99

At least one multi-car vehicle accident on southbound Highway 99 near Kansas Avenue in Modesto this afternoon afternoon backed up traffic for at least a mile mile.

The initial accident occurred at 2:17 p.m. between three vehicles. CHP reported on its website that there may have been another collision.

It's unknown at this point how many people suffered injuries, and if they were serious.

We'll have more on this story as information becomes available.