CHEMCHINA has released a statement stating that a blast which killed 23 and injured 22 was caused by a vinyl chloride gas leak at its subsidiary Hebei Shenghua Chemical Industry Company, reported Reuters. The company is located in Zhangjiakou, China. The explosion occurred on 21 November as acetylene was being delivered to nearby Haipo'er New Energy Technology Company, reported official news agency, Xinhua. A vinyl chloride gas leak at the chemicals company caused a truck to explode.