A video showing a man being arrested in Allentown, Pennsylvania, has sparked protests after one officer can be seen placing his knee on the man’s neck.

The video, taken on Saturday from a passing car, shows three police officers restraining the unidentified man outside of St. Luke’s Hospital-Sacred Heart, and a hospital employee can be seen standing by and watching, reports BuzzFeed News.

"Get off his neck," a woman in the car can be heard saying.

“He can’t breathe,” a second person in the car says.

The video initially shows the officer with his elbow in the man’s neck and then switching his positioning, placing his knee there instead. As other hospital employees arrived on the scene, one walks toward the car, blocking the view and urging them to continue driving.