Taxi drivers are fuming over being denied access to the passenger building at Billy Bishop Airport.

The Toronto Port Authority alleges the drivers are to blame for messy and unsanitary conditions in the building's washrooms. They site defecating on walls, hand driers and floors in a memo.

On July 16th, drivers got that memo from the authority ground services manager as a final warning about the washrooms, then, the very next day they got another memo telling them the washrooms were off limits to them.

As a temporary solution, two portable washrooms have been set up outside for drivers.

Sajid Mughal represents about 750 cabbies in the city and tells The Star, a few drivers have said they won't go back to the airport if they're being treated that way. They feel segregated according to Mughal. He also says there's no way of proving that it's taxi drivers that are causing the mess since the second-floor washroom in the building is open to the public.

The port authority says they will revisit the washroom ban next month with the taxi association.