An investigation has been ordered after nearly 100 garment factory workers fainted at the Hung Wah (Cambodia) Garment Manufacturing factory in Phnom Penh's Dangkor district.

Local media reports suggest chemicals or exhaustion are to blame, and the Ministry of Labour and Vocational Training has vowed to investigate.

Earlier this year another mass fainting hit the headlines when several hundred workers were rushed to hospital after collapsing at Puma shoe supplier Huey Chuen, in Phnom Penh's Dangkor district.

A just-released report from the Fair Labour Association says there was a "strong possibility" the incident was caused by a combination of exposure to dangerous chemicals, inadequate ventilation, excessive working hours, and health and safety breaches.

As reported by just-style last month, Puma has accepted the criticisms made in the report and developed a comprehensive remediation plan that includes a clear timeline, as well as a process to verify its implementation.