JAKARTA, Indonesia (AP) - Indonesian police said Thursday they have arrested 230 people suspected of starting some of the fires that are spreading health-damaging haze across a large part of Southeast Asia.
Among those arrested are three men who were caught Monday while trying to clear land to plant crops in Tesso Nilo National Park, which is home to about 140 endangered wild elephants, said Dedi Prasetyo, the national police spokesman.
Those arrested could be prosecuted under an environmental protection law that provides for a maximum 10-year prison sentence for setting fires to clear land.
Indonesia’s fires are an annual problem that strains relations with neighboring countries. The smoke from the fires has blanketed parts of Indonesia, Singapore, Malaysia and southern Thailand in a noxious haze.
Poor visibility caused by smoke has caused delays of flights at several airports in Indonesia and Malaysia and prompted authorities to shut thousands of schools in some parts of the two countries, affecting more than 1.5 million students in Malaysia alone.
Malaysian authorities have been conducting cloud seeding operations in an attempt to clear the haze and are considering passage of a law that would penalize Malaysian plantation companies that start fires abroad.
Environment Minister Yeo Bee Yin said Thursday that a more lasting regional solution is needed.
Singapore, directly across the Strait of Malacca from Indonesia’s Riau province on the island of Sumatra, experienced air pollution levels ranging between moderate and unhealthy levels on Thursday.
Elevated levels of PM2.5, tiny airborne particulates, caused Singaporean authorities to issue health advisories to limit outdoor activities, especially among the elderly, pregnant women and children.
PM2.5 particulates are small enough to be sucked deep into the lungs and enter the bloodstream, and can cause respiratory problems and over time may raise the risk of cardiovascular disease and cancers.
Thailand’s southernmost provinces, which are north of Malaysia halfway up the Malay Peninsula, were blanketed with haze from Indonesian fires on Thursday.
Thai authorities said the level of air pollution has risen since Sept. 5, reaching a dangerous level in the last few days.
The Air Pollution Research Station of Prince of Songkhla University urged residents of the affected areas to refrain from outdoor activities and not leave home without wearing masks.
Health officials in Yala province have been giving out free masks to people on the streets while urging motorists to exercise caution when driving on highways because of poor visibility.
“We face the problem every year between July and September, the worst was in 2015,” said Kaneungnit Srisamai of the government’s environment quality monitoring center. “We have seen less smoke in the last four years, but this year we may be facing it again due to a reduction in rainfall.”
In addition to the arrests, Indonesian authorities have also sealed off land owned by at least 49 plantation companies in the past week for investigation after fires were found there.
The Indonesian Disaster Mitigation Agency detected 4,319 hotspots across the country on Thursday. It said 99% of the hotspots were caused by deliberately set fires.
The agency said 44 helicopters had dropped more than 270 million liters (71.3 million gallons) of water and 163 tons of salt for cloud seeding as part of the firefighting efforts.
Indonesian authorities have deployed more than 29,000 people to fight the fires, which have razed more than 328,700 hectares (812,000 acres) of land across the nation, with more than half in the provinces of Riau, Jambi, South Sumatra, West Kalimantan, Central Kalimantan and South Kalimantan.
Indonesia’s annual dry season fires were particularly disastrous in 2015, burning 2.6 million hectares (10,000 square miles) of land. The World Bank estimated the fires cost Indonesia $16 billion, and a Harvard and Columbia study estimated the haze hastened 100,000 deaths in the region.
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Associated Press writers Busaba Sivasomboon and Grant Peck in Bangkok and Eileen Ng in Kuala Lumpur, Malaysia, contributed to this report.
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