CHICAGO (AP) A group of Chicagoans who say they need oxygen to walk and exercise on the streets have been protesting at a downtown restaurant, where the owners are using a portable oxygen machine to deliver oxygen.

The activists are demanding that the owners remove the machine from the building, which they say causes health risks.

The owners say they are using it to help people walk.

The group of about 30 people say they’ve been protesting the owner of a portable O 2 machine for a few days because of health issues and are calling on other businesses to do the same.

They say it’s been a problem that affects their health.

Some have asked the owners for a refund.