Got poisoned with carbon monoxide

On January 10, at 9:50, an alarm call was received at Gyumri police division, informing that Misak Ghandilyan, born in 1961, a resident living at the following address: Gyumri town, street 13, building 2, apt. 11, was taken to them for carbon monoxide poisoning.
At about 11:00, an alarm call was received from Gyumri town Austrian children's hospital, informing that Aregnaz Ghandilyan, born in 2000, was taken to there. It was found out a bit later that Hovhanness Ghandilyan, born in 1992, was also in the flat, who had deceased.
The circumstances are being clarified.