MILWAUKEE (CBS 58) -- Dozens of business owners in Milwaukee are calling on city leaders to require masks inside establishments to help stop the spread of the COVID-19. 

More than 70 businesses wrote a letter to Milwaukee Mayor Tom Barrett and Common Council President Cavalier Johnson on Tuesday, June 30 calling on them to require employees and customers to wear masks in places like stores, theaters, museums, restaurants and bars.

Business owners say without a city mandate, some customers may not comply with wearing masks and it will hurt business. They say another outbreak could result in another stay at home order and could cause businesses to close down for good.

The letter was signed by Fiserv Forum, Colectivo Coffee and the Pabst Theater Group, among others.

The petition can be found here.