Two workers have been killed due to an outburst of methane and rock masses at the Pniowek coal mine in southern Poland, owner JSW said on Monday evening.
The company said that after 5:00 pm (1600 GMT) on Monday, a large amount of methane was released at the Pniowek mine, where a high-performance roadheader was operating with 10 workers underground.
Eight managed to evacuate on their own, while contact with two others was lost, JSW said. After a seven-hour rescue operation, teams located the missing miners who were pronounced dead at the scene by a doctor, the company said.
On Tuesday morning, Poland's Prime Minister Donald Tusk offered condolences to the victims' families on X, while President Karol Nawrocki said he received the news of the miners' deaths "with great sorrow".
Polish Press Agency (PAP) said that the deaths were the 14th and 15th fatalities in mining accidents in Poland this year, and the 11th and 12th in hard coal mines. The Pniowek mine is among the country's operations with the highest methane risk, PAP reported.
At least five people died when a small Mexican Navy aircraft crashed on Monday off the Texas coast near Galveston during a mission for an organisation that helps child burn victims, including transferring them for treatment in the US.
Prime Minister Benjamin Netanyahu has said on Monday he will discuss Iran's nuclear activities during his visit next week with US President Donald Trump.
US President Trump announced plans for a new "Trump class" of battleships on Monday, marking the start of an expanded naval buildup and signaling increased scrutiny of defence contractors over production delays and cost overruns.
Thailand and Cambodia have agreed on Monday to hold a December 24 meeting of defence officials towards resuming a months-old ceasefire, as fierce border fighting between them entered a third week with at least 80 people killed so far.
US President Donald Trump named Louisiana Governor Jeff Landry on Sunday as his special envoy to Greenland, drawing renewed criticism from Denmark and Greenland over Washington's interest in the mineral-rich Arctic island.