ITV News understands that the owners of the Unity Mine in Neath are filing for administration.
Around 200 people currently work at the site.
Local AM, Gwenda Thomas, told us: "It is extremely regrettable that Unity mine has gone into administration."
I sincerely hope that the administrators can find new owners for the mine, and preserve the miners’ jobs and the future of the apprentices. Welsh Government officials continue to be in discussion with the mine.
More top news
Hannah is in Carmarthenshire finding out what is happening at the National Botanic Garden of Wales 15 years after it first opened its doors.
A prize-winning pooch from Bala caused a stir at this year's Crufts competition after going to the toilet in the arena.
A cloudy night through many central and western parts, clearer skies at times in the east. A mild night with brisk southwesterly winds.