Four of them are released from the hospital.
The victims of the accident include eight jail inmates, a public works employee and two Fresno County Sheriff’s deputies.
The four released from the hospital include two of the jail inmates and the deputies.
One of the jail inmate and the public works employee are in critical condition and it was reported that the inmates condition is life threatening.
The explosion occurred on a Pacific Gas & Electric Co. at the Fresno County Sheriff’s gun range while the county employee was using a front loader to build a dirt berm to confine the gunfire to the range.
The jail inmates were cleaning up the place and they were about 50 feet away from the explosion.
The explosion has sent flames over the highway 99 and it has wrapped the 400 feet railway, halting the traffic on the highway and the closing the railway line.
The officials said that they don’t have any idea whether the front loader was used to dig at the time of explosion.
In 2010 PG&E pipeline has killed 8 people in San Francisco suburb of San Bruno since then natural gas operations of PG&E are under scrutiny. Faulty safety practices and lax oversight by state regulations were blamed for the accident then.
PG&E said that the pipeline was buried and was damaged by the vehicle, in Friday’s incident.
According to 2013 survey, there was 40 inches of cover between the pipe and the surface which is in accordance to federal code and PG&E standards.
The spokesman Nick Stimmel said, it was not notified to the PG&E of nay work in the area otherwise they would have marked gas lines.
Earlier in the construction zones PG&E has marked the locations of gas line said Sheriff Margaret Mims.
Stimmel said that the PG&E crews are planning to cap the line so that they can remove the damage on Saturday.
Union Pacific spokesman Francisco Castillo said that the crews will also work on the repairs to reopen the freight rail line.
Federal pipeline and Hazardous Materials Safety Administration are working with California Public Utilities Commission to investigate the explosion.