Fifty-four people were sickened at a hospital by toxic fumes from the vomit of a man who apparently attempted suicide by swallowing pesticide Wednesday night, police said.

The toxic gas, believed to be a vaporized form of liquid pesticide, came from a 34-year-old farmer from Koshi, Kumamoto Prefecture, who was undergoing treatment at the Japanese Red Cross Kumamoto Hospital emergency room in Kumamoto at about 11 p.m.

Doctors, nurses, visiting patients and their families who inhaled the toxic fumes suffered pain in their eyes and throat. Ten of them were admitted to the Red Cross hospital and other hospitals. One of the 10, a 72-year-old woman, suffered breathing difficulty and was in serious condition Thursday.