Evidence of further subsidence has been found around the site of a mine collapse in Co Monaghan, following an aerial survey.

Last month, a local school was evacuated and some playing fields at a nearby GAA club subsided after the collapse at Magheracloone in the south of the county.

This afternoon, Monaghan County Council said the further subsidence was outside of the original 120m-radius disturbance zone established by Gyproc Ireland, but within the original 2km area of assessment.

In a statement, the council said: "This discovery reaffirms the need to maintain a safety cordon around the perimeter of the former underground mine at Drumgossat."

It added that technical assessments were ongoing and the council expected to receive a detailed geological assessment from Gyproc early next week.

Gyproc Ireland has been operating in Ireland since the mid-1930s and mines gypsum at the Co Monaghan site.

Concerns were raised in the Dáil earlier today that jobs could be lost as a result of the collapse.

Local Fianna Fáil TD Niamh Smyth said: "Sinkholes have emerged along with significant land subsidence in Magheracloone, on the GAA grounds.

"We have learned this morning that they could be five years waiting before they can actually move back in."

She said it has caused significant disruption to the local community, but particularly to the local employers.

She asked if the Minister for Enterprise and Jobs had engaged with Doran Motors, Treacy's Hotel and Gyproc to ensure that there were no job losses "as a result of all this".

Minister of State Sean Kyne outlined that Minister Heather Humphreys visited the site on 25 September following the collapse.

He said: "Gyproc is a very important employer in the locality and I know there is inconvenience with regards to be roads being closed.

"This is a health and safety matter and my department's mining division and the Geological Survey of Ireland have visited on a number of occasions and have advised Monaghan County Council with regard to the best approach.

"While this is a health and safety matter, we are very conscious of the disruption to locals and the need to ensure that the best advice is taken."

He added that there was an independent technical survey taken in relation to the causes of the collapse and what lessons can be learned.