Six people died when a propane-butane cylinder exploded at a restaurant in the northwest Czech city of Most, setting the building on fire, emergency services said on Sunday.
Eight people were injured in the fiery blast that occurred late on Saturday evening, and 30 people were evacuated from the restaurant and surrounding buildings, the Czech fire rescue service said on X social media platform.
"According to initial information from witnesses, a heater overturned, causing a fire," the fire brigade said.
Interior Minister Vit Rakusan told Czech Radio the cause was likely a propane-butane heater overturning in the restaurant's front garden.
The fire brigade said it had rescued one seriously injured restaurant guest who had been trapped in a bathroom.
Around 20 guests were in the restaurant at the time of the explosion, Czech Radio said.

Trump cancels US strikes on Iran, citing progress in talks
US confirms third strike on Indian-crewed tankers this week
UK defence minister Healey quits, says PM Starmer's plans fail to keep country safe
False alarm at the Pentagon triggers brief shelter-in-place order
Trump says US will hit Iran 'very hard', take control of energy infrastructure
US and Iran trade attacks for a second day, undermining shaky ceasefire
Bahrain says debris from intercepted Iranian drones injures child, damages homes
Philippines launches probe into deaths of two athletes from top basketball team
