Former Taoiseach Bertie Ahern is reportedly taking part in secret peace talks in Ukraine.
The Sunday Times reports that Mr Ahern is working as an unpaid facilitator with Crisis Management Initiative, a not-for-profit conflict resolution group.
The newspaper reports he returned to Dublin from Kiev last Tuesday and expects to return to Ukraine in the coming week.
Mr Ahern has criticised the EU response to the crisis in Ukraine, saying initial sanctions were not enough.