Firefighters join an all-out rescue after an explosion rocked a chemical plant on March, 22, 2019 in an industrial park in Yancheng city, China (Photo: Xinhua/VNA)

The blast has left 94 people with severe injuries, including 21 in critical conditions. The explosion happened Thursday afternoon following a fire that broke out in a plant in a chemical industrial park in Yancheng city. China has been trying to raise safety standards following deadly explosions at chemical plants in recent years. On November last year the explosion at Hebei Shenghua Chemical Industry Co. PVC factory in China's Hebei province caused 24 deaths and 21 injured.