Residents were evacuated from a Georgia Tech dormitory Thursday morning after a student reported smelling gas, officials said.

Residents of Hopkins Residence Hall said the fire alarm went off shortly before noon, and firefighters went door-to-door to make sure all students left their rooms.

Authorities on the scene at the four-story co-ed dorm identified the source of the smell after about an hour, Georgia Tech spokesman Joshua Stewart told AJC.com. He said it was caused by a power generator that contractors were using on the roof.

RELATED: Crews investigating gas leak near State Capitol

The natural gas in the building was shut off as a precaution, but Stewart said there was never actually a gas leak in the building.

Students were allowed to re-enter the dorm at about 1 p.m.

Techwood Drive was shut down between North Avenue and Bobby Dodd Way during the evacuation, but all lanes have since reopened, school officials said.

Students evacuated at Georgia Tech

In other news: 

Crews started the process of removing the SunTrust Park signs from the Braves' stadium ahead of a name-change.
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