TOKYO -- An oval-shaped pit suddenly formed on a busy road in Yashio, Japan, on Tuesday, taking down a truck and trapping the driver inside. Emergency crews battled unstable ground and debris.

Rescue operations continue early Wednesday morning, after a truck fell into a hole in part of a busy intersection near Tokyo that caved in on the previous day.

The driver of the truck could communicate with rescue teams when his truck was first swallowed, but there are fears for his safety as sediment fills the hole.