In September 2025, security forces in Chiang Mai and Chiang Rai stepped up their fight against drug trafficking. They seized 6 million meth pills hidden in vehicles at a PTT petrol station. On 15 September, Provincial Police Region 5 ran a multi-province sting across Chiang Mai, Chiang Rai, and Lamphun. Officers recovered almost 10 million meth pills and 100 kilograms of crystal meth. More than 22 million meth pills were seized across the province in September alone.