Police say they investigated 20 locations from April 27 to 29 resulting in 11 bylaw charges for improper licensing.

Canada Border Services Agency also detained 11 women for immigration-related matters who appeared for admissibility and detention hearings last week.

Removal orders were then issued for each woman.

All 11 were found to be working without a valid work permit, police said.

No criminal charges were laid but police said the border services investigation continues, which could spark more charges.

Ottawa police also said additional investigations were launched after the three-day bust.