(Decanter) - A winemaker in southern France has been caught out passing off Spanish wine as French, heightening tension in the region after a wine tanker from Spain was attacked earlier this year.

French customs officials have charged a grower in the Aude region of Languedoc-Roussillon with selling Spanish wine labelled as table wine – or ‘vin de table’ – from France.

According to a report in the local L’Independant newspaper, a French grower based near Narbonne sold 30,000 hectolitres of wrongly labelled wine to a large merchant in the region. That’s equivalent to around four million bottles.

The grower, who has not been named, was fined 97,000 euros for passing off the Spanish wine as French, the paper reported. It said the grower bought the wine for between 25 to 35 euros per hetolitre and sold it for double the price.