Chinese officials have halted construction on the $5.1-billion, 43-mile-long No. 1 subway line under construction in Hangzhou until investigations are completed on what caused a major collapse on Nov. 15.

Photo: AP/Wideworld

The collapse created a 246-ft-long, 50-ft-deep crater that sucked in a 250-ft section of roadway above the construction site. At least five fatalities have been reported.