Travellers have parked about 30 vehicles on fields next to a primary school after being warned over blocking a route to Aldi.
Police received several reports of an obstruction on Bradley Stoke Way between 6pm and 9pm yesterday (September 28).
Members of the public complained cars and caravans were blocking traffic heading to the Aldi store on Brook Way.
An Avon and Somerset police spokeswoman said there were concerns of this “potentially causing a risk to road users”.
She added: “Officers attended and issued advice to the owners, who subsequently moved on.”
The camp then pitched up at fields near the Jubilee Community Centre and Stoke Lodge Primary School, where they remain today.
Police have received reports of antisocial behaviour on the fields, which are understood to be owned by South Gloucestershire Council.
One witness said: “There are about 10 caravans, about 20 cars and trucks, plus some wood chippers.
“A big pile of wood chips has been dumped on the football pitch next to one of the caravans. A load of dogs are barking at people walking past.
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“The camp is on two parts of the site. One is in the back end of the car park, with two caravans, two trucks and a car. The rest are in the top field.”
It is understood the wood chips have been left close to a car park used as a drop-off area for the primary school.
The force spokeswoman said: “The neighbourhood team are monitoring the issue, working alongside the local authority.”
The council’s website says there are up to 100 unauthorised encampments in South Gloucestershire each year.
“The number of travellers has been consistent over many years and reflects our closeness to major routes and the traditional links of travelling families with this area,” it adds.
“The council runs two authorised permanent sites that are oversubscribed. There are no transit or emergency sites in South Gloucestershire.”
Bristol Live has approached the council for comment on the latest camp.