The emergency services have taken several people to hospital after they became unwell in a house in Belfast.
Police, fire crews and ambulance all turned out to the incident at Damascus Street in the south of the city.
Police said a number of people had been taken to hospital for treatment.
The public is being asked to avoid the area.
The PSNI said it would issue an update in due course.
A spokesperson for the NI Ambulance Service said: “The Northern Ireland Ambulance Service received a number of 999 calls shortly after 17:00 on Tuesday 30 September following reports of an incident in the Damascus street area.
“NIAS despatched four Emergency Crews to the incident.
“Following assessment and initial treatment at the scene, four patients was taken to the Riyal Victoria Hospital.”