The Reno Fire Department responded to report of a hazardous materials release, Wednesday morning.
Officials responded to the area of 200 Mill Street at the Lakemill Lodge around 5 a.m.
A person said they saw a white vapor cloud, making it hard to breathe.
However, officials say a fire extinguisher discharged, causing the appearance of a white vapor cloud.
Authorities closed off the street, and after investigating the area, RFD says there were no hazardous materials found.
(Reno Fire Department contributed to this report.)
