Fatal carbon monoxide poisoning, commonly referred to as cool, occurred on Thursday, January 15, in 1 of the tenement houses in the center of Chełmno (Kujawsko-pomorskie Voivodeship). Firemen found bodies of a 30-year-old female and 3 of her children– Around 5:00 p.m., a female (sister of the victim – ed.) reported to the Chelmin police afraid about her deficiency of contact with her comparative and the absence of her children at school since the beginning of the week," she said in a conversation with TVP3 Mr Monika Chlebicz, the spokesperson for the Provincial Police office in Bydgoszcz.– Patrol headed for the scene after entering the tenement house, incapable to enter the premises, called the fire department. Even before the firemen entered the apartment, the measuring devices indicated a very advanced concentration of carbon monoxide – a police officer reported. She added: "In the middle, officers and firefighters came across bodies of a 30-year-old female and 3 of her children: 2 girls aged 7 and 11 and a 2-year-old boy. At the scene of the tragedy, the prosecutors appeared and ran in the field of firefighting.– 3rd organization participation was initially excluded. Everything points to tragic carbon monoxide poisoning," said Mr Monika Chlebicz. The people of Chełmna are shocked by the tragedy.– We knew this household very well. This female raised these children herself," said 1 of the women. To say it's a tragedy is to say nothing. That's what you want to cry about. Very advanced concentrations of carbon monoxide The firemen operating at the site of the tragedy informed – says TVP3 Bydgoszcz – about the "terrifyingly high" concentration of carbon monoxide. It was about 900 units. But already at 400 ppm there is simply a failure of consciousness – the firemen say The origin of the coolness was most likely a gas stove to heat the water. Carbon monoxide is odourless and colourless. It makes us not feel it until there's symptoms of poisoning. Therefore, the fire department and police are constantly calling on residents to mount carbon monoxide sensors and smoke detectors. These devices detect blasts and smoke and sound alerting the danger, giving time to evacuate and call for help. From 2030, having blast and smoke sensors will be mandatory in the combustion sites. Read also: