SINGAPORE, May 12 -- A doctored photo of Singapore's Senior Minister of State Low Yen Ling has been used in an elaborate investment scam targeting Chinese citizens via a fake app and WeChat group, prompting warnings from both Low and Temasek.

In a Facebook post today, Low said her image was misused "on a China app, also called Taibai, and a group on messaging app WeChat" to promote fraudulent wealth management products.

The app impersonated a Temasek subsidiary and was used alongside a WeChat group called Jing Shang Hui, or "Beijing chamber of commerce", to market bogus investments.

Temasek, a Singapore government-owned investment company that manages a global portfolio across various sectors, confirmed it owns a subsidiary named Taiba...