Some homes and businesses were evacuated in an Etobicoke neighbourhood this morning following an ammonia spill.

The spill occurred inside an industrial building in the area of Evans Avenue, near Kipling Avenue and the Gardiner Expressway.

Toronto Fire Services says a refrigeration unit is to blame for the spill.

Homes and businesses within a 500-feet radius of the spill were evacuated but it appears people have been allowed to return to nearby buildings.

Some train tracks in the area were shut down but GO Transit says it did not have an impact on service.

A male in his 50s who was exposed to the chemical was reportedly having difficulty breathing when crews arrived on scene.

Paramedics say one man was taken to hospital with minor injuries.

Evans Avenue was closed between Kipling Avenue and Bellman Avenue but the area has since reopened to traffic.