Police and forest rangers using FPV drones found a cannabis plantation hidden in thick vegetation on the steep slopes of Mount Semeru, inside Bromo Tengger Semeru National Park, in September 2024.[1] The site near Argosari village in Lumajang Regency held more than 38,000 plants across 49 fields covering about 1.5 hectares, some plants up to two metres tall.[2]

Between September and October 2024 the police destroyed more than 47,000 marijuana plants on the mountain’s slopes, and seized 10 kg of dried marijuana.[1] A photograph shows officers and rangers uprooting plants on the slope on 31 October 2024.[1]

At least four suspects, all villagers from Argosari, were arrested; the arrested farmers said a man known as Edy had hired them to tend the crop, and he remained at large.[1][2] Under Indonesian law cannabis is a type-1 drug in the same class as heroin and methamphetamine, and cultivation carries long prison terms.[2]