One miner has been killed and another injured after an explosion in an underground shaft.
The blast happened at Lisheen Mines in Co Tipperary at around 6.30pm on Wednesday.
Gardai said the victim was a man in his 40s. His injured colleague, who is in his 50s, was taken to Cork University Hospital for treatment.
A Garda spokesman said it is understood there was an explosion in an underground shaft.
The area has been sealed off for a technical examination and the Health and Safety Authority is also investigating.
Lisheen Mines is located between the villages of Moyne and Templetuothy and is one of the largest producers of zinc concentrates in Europe.
Now in its second decade of operations, it employs approximately 372 people, 70% of whom are recruited locally.
It is understood the victim was from the nearby village of Two Mile Borris.
Local councillor John Hogan said the mine had an excellent safety record.
"A lot of local people were working in the mine so everybody is feeling the pain," he said. "People are devastated because it could be anybody's family."