Witnesses say they heard a loud noise underground at around 10:30 p.m. in the 1000 block of Tree Street.
The explosion affected around 5,000 PECO customers.
There are no reports of injuries.
Witnesses say they heard a loud noise underground at around 10:30 p.m. in the 1000 block of Tree Street.
The explosion affected around 5,000 PECO customers.
There are no reports of injuries.