Rescuers were searching for four missing miners in southwestern Poland on Wednesday after an earth tremor caused rockfalls deep underground in a copper mine owned by KGHM.

Trump’s investments could affect any decision he makes on the US$3.8 billion project as president.

The Canadian miner posted a loss of $13.9 million in its first quarter.

Essential for ancient artifacts like the famed burial mask of Tutankhamun, gold has been mined in Egypt for millennia.

Afghanistan has reserves of coal, copper, iron ore, zinc, mercury, rare earths, gems such as rubies and emeralds, gold and silver worth about $3 trillion.

The more than 2,000 people who gathered in Ulaanbaatar's Freedom Square claimed foreign companies have exploited Mongolia's mineral wealth, which accounts for 94% of the nation's exports.

In late December, there were 11 deaths in coal mines nationwide for the year, putting the industry on track to best the record low of 16 set in 2014.

The mine, already one of the biggest in the state, would double in size as company bets on rebound in prices.

A wall in a vast coal pit collapsed in the central Philippines early Friday, killing five workers and leaving at least four others missing at a site where a similar deadly accident occurred two years ago, a governor said Friday.

The gang members, dressed in fluorescent vests and hard hats, calmly carried bags and wheeled garbage bins into a high-security storage facility in London's diamond district.

Less than five years after an explosion fueled by excess coal dust killed 29 men deep inside a West Virginia underground mine, the nation's coal mines are on pace for an all-time low in work-related deaths.

Ten Chinese miners were found dead Sunday hours after they were trapped underground in an explosion at a mine in the northeastern province of Heilongjiang, state media said.