A man hospitalised after an explosion in Darlington is in a "critical condition" according to police investigating the event.
Emergency crews were called to the scene of the blast - a house on Wordsworth Road - at 6.20pm last night.
Neighbours were evacuated from nearby homes following the explosion.
Durham Constabulary are now investigating the cause of the blast and want anyone with any information to come forward.
Officers can be contacted by calling 101 quoting reference 371 of February 19.