Two brothers have been arrested on charges of growing a marijuana plantation in one of the biggest public parks in Palermo, Sicily, Ansa news agency reported on Wednesday.

Police say the men, aged 25 and 30, had grown about 20 marijuana plants each at least two meters (six and a half feet) high in the Italian city’s Parco della Favorita, Ansa reported.

The pair were arrested as they carried watering cans to the site, which was hidden by vegetation. Police who raided their home found 3,000 seeds, more marijuana and cash thought to be from sales of the drug.

The men’s parents also have been charged in the case.