Prosecutors opened an inquiry on Sunday into 2 explosions at an unlicensed liquefied petroleum gas filling station that left 2 people dead, and 56 people injured north of Romania’s capital Bucharest at the weekend.

Most of the injured were firefighters who rushed to the station in the Crevedia commune to extinguish the blaze from the first explosion before the second occurred late on Saturday.

The two people who died were a couple, emergency department head Raed Arafat told reporters. The man suffered a heart attack, while the woman died after sustaining severe burns, he added.