Officers want to trace a man from the Cwmbran area who has threatened to harm himself.
The man called the Ambulance Service three times yesterday morning, before 6.20am, stating he intended to harm himself.
Despite re-contacting the man and attempting to establish his identity in order to help him, neither the Ambulance Service or Gwent Police have been able to as yet.
Officers are now concerned for his welfare.
The man also called another agency over the last 24 hours but again failed to leave any details that could identify him.
Police and other agencies want to make sure he has access to any help he may need.