Ho Chi Minh City police are searching for a man who allegedly pricked nine women with a syringe this week.
Police in District 9 said the unidentified man attacked the female workers on their way to work in separate incidents.
At around 2:30 p.m. on Tuesday, T., 32, was walking to a company in Saigon Hi-Tech Park when a stranger on a motorbike approached her.
The man stabbed the needle into her chest and fled the scene.
T. reported the case to the company and was taken to a hospital for anti-HIV medication.
Eight other workers of the company also reported similar attacks that occurred between 6:55 a.m. and 7:15 a.m. the previous day.
All of them were also given anti-HIV medication.