Media playback is unsupported on your device Media caption Firefighters tackle the blaze in Miryang

At least 37 people have been killed and about 130 injured in a fire at a hospital in South Korea.

The blaze is thought to have started in the emergency room at Sejong Hospital in the south-eastern city of Miryang.

Nearly 200 patients were inside the building and an adjoining nursing home when the fire broke out in the morning.

It is South Korea's deadliest fire in almost a decade and the death toll is expected to rise with several of the injured in critical condition.

Firefighters said the victims appeared to have died from smoke inhalation. Three hospital medical staff - a doctor, nurse and nursing assistant - are among the victims.

Authorities have given varying death tolls, with police earlier saying 41 had died. But the officials later corrected this, saying some victims were counted twice.

The fire completely gutted the hospital's first floor, South Korea's Yonhap news agency reports.

Miryang is about 270km (168 miles) south-east of the capital, Seoul.

'Falling over and screaming'

The hospital specialised in caring for elderly people with long-term needs, as well as other patients, reported the daily JoongAng Ilbo - and reports suggest many patients would have been too ill or old to escape alone.

Image copyright Getty Images Image caption The fire completely gutted the hospital's ground floor

Image copyright Getty Images Image caption Many of those inside the burning building were elderly

The paper quoted a surviving patient, Jang Yeong-jae, as saying that he was on the second floor when nurses screamed "Fire!" in the hallway and urged people to evacuate.

"But when I opened the exit door, the whole stairway was filled with dark smoke and I couldn't see a thing," he said.

"Everybody was running around in panic, falling over and screaming as smoke filled the rooms."

Mr Jang said he ripped open window screens and escaped down a ladder put up by firefighters.

"There were so many elderly patients on other floors... I wonder if they escaped safely," Mr Jang's wife was quoted as saying.

Fire chief Choi Man-woo told reporters the cause of the fire was not yet known.

The hospital building did not have any fire sprinklers installed, local media said.

Under current laws, the building was not required to have sprinklers, but they were in the process of being fitted in the adjoining nursing home.

A new law that is due to come into force on 30 June will make sprinklers compulsory for nursing homes.

Image copyright EPA Image caption Most of the casualties were due to smoke inhalation

Mr Choi said the fire started around 07:30 local time (22:30 GMT on Thursday) and was put out in about three hours.

Ninety-four patients from the adjacent nursing home were safely evacuated.

South Korean President Moon Jae-in arranged an emergency meeting to discuss ways of dealing with the fire.

Senior officials from both governing and opposition parties travelled to Miryang to offer their condolences and call for a thorough investigation.

Image copyright Reuters Image caption It is not known what caused the fire

Image copyright Reuters Image caption Scores of patients were inside the building and a neighbouring nursing home

The hospital has been operating since 2008 and about 35 medical staff work there, according to provincial officials.

The fire comes just a month after 29 people in the South Korean city of Jecheon were killed in a blaze at a public gym.

The owner and manager of the building were later arrested over multiple safety lapses, including malfunctioning sprinkler systems.