Five people have reportedly been detained after a deadly explosion at a factory in China is thought to have left at least 68 people dead.

The blast took place early Saturday morning in the eastern province of Jiangsu at a car parts manufacturer.

Those arrested were all employees of the company where the explosion occured. The incident is already being seen as the country’s worst industrial accident this year.

China’s Xinhua state news agency has said over 185 people were injured.