Portland police said they're aware of Sunday's event off South Morrison and 2nd Avenue. They're estimating a few hundred people attended; no arrests were made.
The Clark County Sheriff's Office says photos taken by one of the victims led to the arrest of 21-year-old Alexander Rietbrock — who was released a day later.
Food cart and pod owners KGW spoke to say they're worried about a limit on the number of carts per lot and rules about the distance carts must be from one another.