Underground pedestrian tunnel in Boyle Heights attracting squatters, illicit activity

Underground pedestrian tunnels in Boyle Heights, originally built in the 1920s-1930s to provide safe passageways for schoolchildren, have become dangerous sites attracting squatters, trash, and illicit activity. The tunnels, part of a larger network of 220 structures across Los Angeles, were designed to reduce accidents caused by increasing automobile traffic but are now plagued by safety concerns.