This is all terribly sad:
http://www.bbc.co.uk/news/uk-wales-14958647Safety experts have promised lessons will be learned from the investigation into the tragedy which killed four men at a Swansea Valley mine.
The Health and Safety Executive (HSE) says it is too early to know what caused flooding at Gleision Colliery...
Welsh Secretary Cheryl Gillan has announced there will be an inquiry, which will initially be led by South Wales Police before it is handed over to the HSE.
In a joint statement, the HSE and Wales Office said it was too early to give a possible cause....