Crews are pulling out the soap from bathrooms at Detroit Metropolitan Airport after finding bodily fluid in some dispensers.

Authorities say the substance was found in a few soap dispensers in the North Terminal last week. Bathrooms in the McNamara Terminal were not affected.

The airport says the fluid is not spit, but it isn't releasing any further details.

Crews will now be installing "tamper proof" dispensers in all the bathrooms at the airport.