A fire broke out at a chemical factory in Shandong province owned by Shandong Rike Chemical Co Ltd on Tuesday, official China Central Television (CCTV) reported on its mobile phone app.

Photos on the CCTV website showed smoke billowing from the factory.

Seven people died and four others were injured at the factory in Weifang city, the official Xinhua news agency reported, citing a city government statement.

Xinhua did not identify the company.

The blaze started at 9:20 a.m. and has been extinguished.

Cause under investigation.