Japanese Kyodo News on Monday reported that over 50 pupils were hospitalised after a gas smell was detected at Kamei Elementary School in Yao.
According to the news source, around 09:00 a.m. local time (00:00 GMT), a gas smell was reported at an elementary school in Osaka prefecture.
As of 11:00 a.m., the smell was still present, with a possibility of a gas leak not ruled out.
After the smell was detected, the children were evacuated to the schoolyard, where several dozen complained about feeling unwell, which led to the hospitalisation of 51 children, Kyodo News said.
All the children were conscious, and their health was not in danger.
Local authorities investigated the origin of the smell, the report added.
(Sputnik/NAN)