BEIJING, Sept 24 (Reuters) - China will launch an investigation into PVH, the parent company of Calvin Klein and Tommy Hilfiger, for suspected violations of market trading principles regarding Xinjiang-related products, the commerce ministry said on Tuesday.

The U.S. company must provide documentation and evidence within 30 days detailing any "discriminatory measures" taken regarding Xinjiang products over the past three years, the ministry said in a statement.

Additionally, the ministry noted in a separate statement that PVH is suspected of "unjustly boycotting" Xinjiang cotton and other products "without factual basis".

Reporting by Ella Cao and Ryan Woo