Illegal street traders have been targeted in a crackdown on sellers in Oxford city centre.
Two people were arrested and will be deported following the operation by the city council, trading standards, police and immigration officers.
A total of 13 people were reported to be trading illegally in Cornmarket Street on Saturday.
Eleven of the traders now face prosecution and could be fined up to £1,000 for breaching regulations.
Councillor Jean Fooks, from the city council, said: "At the weekend Cornmarket has been awash with illegal street traders which can have an effect on the legitimate traders and the high street shops.
"They are certainly not welcome in our city."
Last year, Oxford City Council issued 120 street trading licences, for one-off and regular traders. It also took action against about 20 illegal traders.
Further investigations into other illegal traders are taking place as a result of the latest operation.
Sellers who trade under The Pedlar's Act 1871 with a valid certificate, cannot set up a pitch in one location and must keep moving through towns and cities.
Official street traders are issued with a "consent to trade" by Oxford City Council, which is valid for one week.