More than 50 people have marched outside a Detroit-area police department to demand the firing of two white officers involved in the aggressive arrest of a black man who was pulled from his car and punched in the head many times.

Video of the bloody arrest of 57-year-old Floyd Dent in January was aired by TV station WDIV.

Inkster Police Chief Vicki Yost met protesters Wednesday and said the incident is being investigated by Michigan State Police. She says the officers are on paid leave.

The Rev. Charles Williams II threatened to "shut Inkster down until we get justice." Yost says she's not hiding anything but won't take further action until the investigation is completed.

The video aired Tuesday night shows one police officer repeatedly beating Dent in the head.