OTTAWA -- Detour buses were running early Monday morning after OC Transpo revealed the smell of natural gas had been reported along part of the Confederation Line.

Enbridge was called to the scene.

OC Transpo announced before 5:00 a.m. that R1 bus service was set to go into effect between Tunney's Pasture and Blair stations.

Regular service had resumed by about 6 a.m..

OC Transpo says the smell was caused by newly-installed switch heaters, which were working normally.

No issues were found with gas lines.