Investigators are requesting video footage of the area from the public at the time of the incident.
The Ministry of Labour is investigating the case, police said.
The gymnasium at Boyle Community Centre will be closed for weeks as the Ministry of Labour investigates a carbon monoxide leak that sent six people to hospital Monday morning.
Six people were taken to hospital after a community centre in London's Old East Village was evacuated Monday morning due to high carbon monoxide levels, officials say.