At least 10 people were trapped after a section of a railway tunnel in China's Inner Mongolia autonomous region collapsed, officials said.
The accident occurred yesterday when workers were digging the tunnel in Zhuozi county of Ulanqab City, about 150
kms from the regional capital Hohhot, the state-run Xinhua news agency reported quoting officials.
About 2,000 cubic metres of rock and mud caved in during the accident.
Experts said the trapped workers could be sheltered by supporting structures in the tunnel, increasing their chances
More than 300 rescuers and 60 machines were drilling through the rubble in a bid to improve ventilation and
establish contact with the trapped workers and to send food and water to them.
The entrance of the tunnel, which is part of a railway line being built to link Ulanqab city's Jining district and
Baotou city in Inner Mongolia, has been cordoned off.
Workers had excavated 300 metres of the tunnel.