Three injured in a flash fire at a Chicago substation

USA, Chicago: Three people were injured in a flash fire at the Chicago Transit Authority substation powered by ComEd.

According to the Chicago Fire Department, the fire took place when an arc flash relayed to a power transformer, sparking the blaze, reports NBC 5 Chicago.

At least three people working in the building were injured in the incident.

Authorities are investigating the incident.

Source: NBC 5 Chicago