JAKARTA, Indonesia — Indonesian police said Thursday they have named seven companies and 133 individuals suspected of causing forest fires that are spreading choking smoke and polluted air across parts of western Indonesia and neighboring Malaysia and Singapore.

National Police spokesman Col. Suharsono said 27 more companies and 85 individuals are still under investigation by police task forces in six provinces in Sumatra and Kalimantan on the Indonesian part of Borneo.

President Joko Widodo has ordered law enforcement agencies to take “stern actions” include revoking their forest concessions and blacklisting those responsible for the fires. Some suspects have been arrested.

More than 100,000 people have been affected with acute respiratory infections in South Sumatra and South Kalimantan provinces.