VIDEO: Eight west Valley firefighters are recovering following an explosion at an APS substation in Surprise on Friday night.
Four Peoria firefighters who were injured are "doing good," according to a department's spokesperson.
In a post on the Peoria Fire-Medical Department's Twitter page, officials say Engineer Justin Lopez, who was in critical condition and taken into surgery following the explosion, "is awake and doing as well as can be expected. He was very anxious until his wife Sara came in the room."
Captain Hunter Clare is described as being in "great spirits."
Matt Cottini and Jake Ciulla were released from the hospital late Friday night, and are "doing really well," according to Peoria Fire-Medical Department.
According to Peoria fire officials, multiple fire agencies were investigating a battery fire at the McMicken Energy Storage facility near Grand Avenue and Deer Valley Road at an APS substation when an explosion occurred, injuring four members of the Peoria Fire Department.