Explosion at unfinished Tokyo subway

An unfinished subway experiences a brief explosion, initially causing public panic as people suspect a bomb from the sky. However, it is later revealed that the explosion was due to a gas leak from a main into the subway, which was still under construction.

What event occurred in the unfinished subway?

• A fire broke out

• A brief explosion happened

• A flood occurred

• A collapse took place

What was the initial assumption about the explosion?

• It was a planned demolition

• It was a technical fault

• It was a natural disaster

• It was a bomb from the sky

What was the actual cause of the explosion?

• A bomb

• A fire

• An electrical fault

• A gas leak

Where did the gas leak into?

• A nearby building

• The subway under construction

• A water main

• The street above

What was the status of the subway at the time of the explosion?

• Closed for maintenance

• Fully operational

• Under construction

• Recently opened