Ambikapur:As many as 37 persons, including 33 school students, were injured after a helium cylinder and a balloon filled with gas exploded in the premises of a private school in Chhattisgarh's Surguja district on Thursday afternoon, police said. The incident took place after 2 pm in the ground of Vivekanand School in Ambikapur city when a helium cylinder was being used to fill balloons, Surguja Superintendent of Police Sunil Sharma said.
Suddenly, the cylinder and a balloon burst, causing serious injuries to four persons who were engaged in filling helium gas into the balloons, he said. Thirty-three children of the school, who were playing in the ground during lunch break, came under the impact of the explosion and sustained minor injuries, Sharma said.