Beijing: At least 20 people were killed on Saturday in a blast inside an under-construction expressway tunnel in China, officials said.
The incident took place around 830 am in Yanling county of Zhuzhou city in central China`s Hunan province, Xinhua reported.
Officials said a vehicle carrying explosives was unloading its stock inside the tunnel.
A total of 24 people were working in the tunnel when the blast occurred. Four of them were pulled out.