South Wales Fire and Rescue say there is "major disruption" in an area of Cwmbran following a gas leak.
Gwent Police say people were evacuated from the Ashbridge Inn after a gas pipe was severed.
A 100 metre cordon is now in place.
Road closures closures currently in place are Avondale Road from the Nissan garage up to Bevans Lane, Chapel Lane to the roundabout at the top of Edlogan Way, and Pontrhydyrun Road to the roundabout on the A4051.
Diversions have been put in place by the local authority and they have advised that they will remain for at least another 24 hours.
#swcontrol crews in attendance with gas board at an incident involving gas leak on Avondale Rd, Cwmbran. Major disruption in area likely. cw
More top news
A dull and damp start to the week for much of Wales, with eastern areas enjoying the best of any sunshine!
The family's solicitor said they are "losing patience and faith" in the inquiry which is looking into Mr Sargeant's sacking.
A 30-12 win over Argentina in Santa Fe pushed Wales into third in World Rugby's rankings.