More than 50 members of a Mormon congregation in Utah suffered symptoms of carbon monoxide poisoning during a service this weekend.
At least 54 members of the Church of Jesus Christ of Latter-day Saints meetinghouse in Monroe, Utah, reported symptoms, but only 49 required medical treatment, according to NBC News.
The church believes the cause may have been a malfunction in the building's heating system.
Church officials said the building will remain closed until the issue is confirmed to be resolved.
The church said in a statement that it was “concerned for the well-being of all those affected and pray for their recovery,” and is “working to assist affected parishioners with medical and other expenses.” he added.
At least 22 people were hospitalized immediately after the service, although specific details of their symptoms from Sunday's incident were not disclosed.
According to NBC, the problem began when a 4-year-old girl complained of difficulty breathing, followed by a man who felt unwell and a third person who complained of a headache after leaving the building.
Eventually, the local fire department was called. A carbon monoxide leak was confirmed and evacuation was ordered.
According to NBC, the Monroe Sheriff's Office said local first responders did not have enough ambulances to transport all the people with symptoms, so units from neighboring counties were called in.
Church officials have not announced when the building is expected to be used again.
