Five people have been hurt, some badly, after a restaurant balcony collapsed.
The incident happened at the Casa hotel and restaurant on Elland Road in Brighouse, West Yorkshire.
A West Yorkshire Police spokesman said: "Some of those injured are believed to be serious."
Emergency services were called at around noon and said some details of the incident have yet to emerge.
West Yorkshire fire brigade said firefighters were currently at the scene.
A fire spokesman added: "We have reports of five casualties."
One person was airlifted to Leeds General Infirmary with head injuries, a spokesman for Yorkshire Air Ambulance said.
Other casualties are believed to have been taken to hospital in Huddersfield by road.
The balcony is believed to have been a decked area on the outside of the hotel, which is used as a Mediterranean restaurant and events venue.
A spokesman for Yorkshire Ambulance Service NHS Trust said five ambulances, a doctor and a specially-trained hazardous area response team were also sent to the scene.
The spokesman said: "Ambulance clinicians provided treatment at the scene and five adults have been taken to hospital for further care.
"One male patient has been airlifted to Leeds General Infirmary and four female patients have been transported by land ambulance to Huddersfield Royal Infirmary.
"All sustained serious injuries but none are believed to be life-threatening at this time."
Sam Holmes, group manager of the Casa Hotel and Restaurant, said: "After the unfortunate incident today, all persons involved are receiving professional care. Our thoughts remain with them and we wish them a speedy recovery.
"All areas of our business are unaffected and we are actively working with the relevant bodies to investigate the incident fully."
Mr Holmes said he could not release any further details about the incident as it was still being investigated.
But he said health and safety officers and building control inspectors had examined the scene and were satisfied the building was safe and could remain open.
Mr Holmes said the accident happened this morning before the restaurant was open when a balcony attached to the main hotel bedroom collapsed on to the patio area below.
He said he did not see the incident.
The injured man was named locally as Jack McDaid, the owner of the hotel and restaurant.
It is believed Mr McDaid was showing a group of four women, who were customers at the restaurant, around the hotel at the time.
The party were standing on the first-floor balcony of the main bedroom, which has views over a lake below the building, when it collapsed.
Mr McDaid is believed to have suffered a head injury.
At the restaurant, the metal balcony could be seen lying on the ground surrounded by shattered glass and patches of blood on the flagged stone patio.
Below the patio doors leading to the bedroom involved, patches of plaster had come away from the exterior wall of the building where the balcony was fixed.
A four-poster bed could be seen behind the patio doors to the bedroom.
Shards of glass were spread around the car park of the hotel, which is situated on a busy road with picturesque views over a lake and hills.