One person died and 57 were injured after two blasts at a liquefied petroleum gas station in southern Romania.
The injured included 43 firefighters who rushed to the scene, following the first explosion near the capital Bucharest on Saturday evening.
Shortly after, a second blast sent a mushroom cloud billowing into the sky.
Authorities said at least eight of the injured had been severely burnt. They plan to send four to hospitals abroad.
People within a 700-meter radius have been evacuated from the area.
“The area is still dangerous… there is a risk of another explosion at another tanker,” said Raed Arafat, head of Romania’s emergency department.
President Klaus Iohannis described the explosions as a “tragedy” and said he was “profoundly saddened” by what had happened.
“An investigation must quickly be launched to see if rules were broken. I ask the authorities to take urgent measures for the injured so that these tragedies won’t happen again,” he wrote on Facebook
