A nature-protection patrol of the Huesca Guardia Civil noticed signs of an outdoor cannabis plot on a hillside in the Hoya de Huesca on 17 October 2026.[1] Two days later, on 19 October, officers from the Huesca company dismantled the plot and arrested the people they believed were responsible.[1]

On the ground they found 72 flowering cannabis plants and the remains of about 1,000 plants already cut.[1] Nearby was a large shelter used for drying, a living area, irrigation tanks, fertiliser, and equipment including destemmers, fans, a heat cannon and a generator.[1] La Vanguardia, citing the same operation, said the people running the site had been living in tents.[2]

Officers seized the 72 plants and about 220 kilograms of cannabis buds, which they put at a market value of about 413,000 euros.[1] The four men arrested are Albanian, aged 36 to 50, and live in Barcelona.[1] They are suspected of cultivating a controlled drug and of belonging to a criminal group.[1] The ROCA team of the Huesca company handed them to the duty court in Huesca, which ordered pre-trial detention without bail.[1] Posts from Ayerbe, Almudévar, Grañén, Huesca and Gurrea de Gállego took part, with the nature-protection patrol.[2]