A collapsed pipe tunnel that killed 3 people is being blamed on an intern who worked as a quality inspector

• Authorities are blaming an intern for a construction firm in China for a tunnel collapse.
• The intern, Wang Nianpu, is named "mainly responsible" and criminally liable while his bosses face fines.
• Wang was supposed to deliver an important stop-work order but failed to do so, investigators said.

Chinese authorities have named a construction intern as likely criminally responsible for a pipe network collapse that killed three construction workers.