Chiang Mai Muang Police Station has intensified checks on entertainment venues across the city, with officers stressing zero tolerance for drugs, firearms and minors on the premises. A random inspection of 84 staff and tourists turned up no drug use. The operation falls under the policy of Pol. Lt. Gen. Krittapon Yeesakorn, Commissioner of Provincial Police Region 5, and Pol. Maj. Gen. Yutthana