William Ntladi, a spokesperson for Ekurhuleni Emergency Management Services, told Xinhua that they received a report that a gas truck was stuck under a bridge in Boksburg at around 7:50 a.m.
"When firefighters tried to suppress the fire, there was an explosion and six firefighters were injured. And they are in a stable condition," Ntladi said, adding that the circumstances will be investigated.
The type of gas carried by the truck was unclear, according to the spokesperson.
