Five people were injured when an underground electrical vault exploded in Long Beach early Tuesday.
Private contractors were working on a Southern California Edison electrical vault at Golden Shore and West Seaside Way when it exploded shortly after 4 a.m., according to Long Beach fire officials. It was not immediately known what caused the vault to explode.
Five people were taken to hospitals, authorities said. The extent of their injuries was unclear.
The incident left 73 customers without power, according to Edison spokeswoman Mary Ann Milbourn. She added that the utility is investigating the situation.
9:55 a.m.: This article was updated with information from Edison.
This article was originally published at 5:40 a.m.