An industrial tunnel in Los Angeles collapsed partially. None of those rescued had major injuries, authorities said.

None of the 31 construction workers rescued in the tunnel sustained visible injuries, according to LAFD. Firefighters said construction workers climbed over a roughly 12 to 15-foot pile of dirt to escape.

There was one entry point to the 18-foot wastewater tunnel that some 31 people were working in late on Wednesday night, per the LA fire department.