Kuwait City, June 12 (आईएएनएस): The death toll in a fire that erupted on Wednesday in a building housing workers in Kuwait has risen to 49, the Gulf country's state news agency Kuna reported, citing the Interior Ministry.

Local media said the fire broke out in a six-floor building crammed with migrant workers in al-Mangaf area, south of the capital Kuwait City.

The blaze occurred while the workers were asleep and some residents had to jump from the building in an attempt to survive, Kuwaiti newspaper al-Qabas reported, citing witnesses.

Kuwait's Emir Meshal Al Ahmad has ordered investigations to determine the cause of the blaze and bring to account those found responsible, Kuna said.

Interior Ministry spokesman Nasser Abu Salib said without elaborating that stringent measures would be taken against the building's owners.

He added that the ministry was investigating the circumstances of the fire and identifying the victims.

Initially, officials had put the death toll at more than 35.

Most fatalities were caused by smoke inhalation, according to a security official.

The Health Ministry earlier Wednesday said at least 43 people had been transferred to hospitals for treatment.