Six arrested for illegal logging in critically endangered Sumatran tiger habitat
Indonesian authorities have arrested six suspects and seized 60 cubic meters of processed timber from an illegal logging camp inside Riau's Kerumutan Wildlife Reserve, a UNESCO-designated biosphere reserve that provides vital habitat for fewer than 600 remaining Sumatran tigers in the wild.
Indonesia arrests six for illegal logging in Sumatran tiger habitat
Indonesian forestry officials have arrested six individuals for illegal logging inside the Kerumutan Wildlife Reserve in Riau Province, a 1.3-million-hectare protected area that serves as critical habitat for the critically endangered Sumatran tiger.
The illegal operation was discovered during an aerial patrol monitoring forest fires, when authorities spotted a logging camp within the reserve. The camp had been operating for approximately two months before detection, according to the Forestry Ministry.
Investigators seized roughly 60 cubic meters of processed timber from the site, along with three chainsaws, timber samples, bicycle tires, and mobile phones as evidence. Several additional suspects fled the scene and remain at large.
The Kerumutan reserve, spanning lowland forests across Pelalawan and Indragiri Hulu regencies, was designated a UNESCO Biosphere Reserve in 2009 in recognition of its importance for biological and cultural diversity. The protected area consists primarily of peat swamp forests, which hold some of the world's largest remaining carbon reserves and play a crucial role in climate change mitigation.
Persistent threat to fragmented tiger populations
The arrests highlight ongoing threats to one of the world's rarest big cats. Sumatran tigers now number fewer than 400 to 600 individuals in the wild, existing in isolated populations of 20 to 30 animals separated by cleared land and human settlements. This fragmentation makes habitat loss from illegal logging particularly devastating to their long-term survival.
Hari Novianto, Head of the ministry's Sumatra Region Forestry Law Enforcement Center, confirmed that investigators are working to identify the operation's organizers and financiers.
We are expanding the investigation to determine who ordered, financed, prepared the equipment, and received the illegally logged timber.
The incident is not isolated. Research has identified illegal logging as a persistent disturbance in Kerumutan over the past five years. Just eight months earlier, in December 2025, police seized 300 cubic meters of timber from illegal logging operations in Indragiri Hulu regency, also within the Kerumutan forest area.
Regional enforcement challenges
Riau Province has emerged as one of Indonesia's primary hotspots for illegal logging activity. Police recorded 26 illegal logging cases in Riau in 2021 alone, making it the second-highest among Indonesian provinces for such violations.
The six suspects face prison sentences ranging from two to 11 years under Indonesian forestry laws. Under Law No. 18 of 2013 on Prevention and Eradication of Forest Destruction, maximum penalties for illegal logging offenses can reach 15 years imprisonment and fines up to IDR 100 billion.
Director General of Forestry Law Enforcement Dwi Januanto Nugroho emphasized the broader ecological stakes.
Kerumutan is facing severe pressures ranging from forest fires to illegal logging. What we are protecting is not just the forest stand, but also the habitat of the Sumatran tiger and other wildlife, as well as the forest's function in supporting the livelihoods of surrounding communities.
The ministry has pledged to strengthen security measures at the reserve through enhanced ground patrols, technological surveillance, and increased collaboration with local communities to prevent future incursions into this globally significant conservation area.