A new issue with medical gas pipework at Belfast's long-delayed new maternity hospital has emerged, the Health Minister has confirmed.
Mike Nesbitt told the Assembly that the scale of the problem is believed to be limited to an isolated section of the hospital.
The hospital, at the Royal Victoria site in Belfast, is already almost 10 years behind schedule after numerous delays but it was hoped it would finally open next year.
In recent months it has been revealed that a high presence of a bacteria in its water system could cause more delay.