Investigation underway into Saturday night residential fire in Calgary southwest

Four units were affected by a fire in an apartment building in southwest Calgary Saturday night. (Darren Wright, CTV News)

Investigation is underway into a residential fire Saturday night in southwest Calgary.

Calgary fire crews responded to a call just after 9 p.m. about a fire at an apartment block on Bracewood Drive S.W.

Calgary police said four units were affected.

No injuries were reported.