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.

Israel warns Lebanon of 'heavy price' as week's death toll nears 300
Israeli settler fatally shoots Palestinian in West Bank
Israel carries out rare airborne raid in Lebanon; 16 killed in strikes
US skips congressional review to approve arms sale to Israel
Flash floods in Nairobi kill 23, disrupt flights at major airport
