A West Virginia hotel was evacuated Tuesday morning after a man died of carbon monoxide poisoning, officials said.

The incident occurred at a Holiday Inn Express in South Charleston, where at least three other guests suffered carbon monoxide poisoning and were hospitalized. One guest was listed in critical condition at Charleston Area Medical Center's General Hospital.

A group of construction workers staying at the hotel found their two co-workers, who were sharing a room on the fifth floor of the hotel, unresponsive at around 10 a.m. Tuesday morning. One of the men was unconscious and the other was dead.

Fire officials detected extremely high levels of carbon monoxide - from 500 to 600 parts per million - on the third, fourth and fifth floors of the hotel. Carbon monoxide levels above 35 parts per million are considered dangerous.

The hotel will remain closed while the cause of the carbon monoxide is investigated.