Baltimore's mayor is asking federal investigators to look into whether the city's police department uses a pattern of excessive force or discriminatory policing.

Mayor Stephanie Rawlings-Blake said Wednesday that the community has a "fractured" relationship with police. Her request came a day after new Attorney General Loretta Lynch visited the city. The mayor says Lynch understands the urgency of her request.

Baltimore saw days of unrest after Freddie Gray, a black man, was taken into custody and suffered critical injuries. He died a week later. The Justice Department is already investigating whether his civil rights were violated and six officers are charged in the arrest and death.

The new investigation the mayor is calling for is similar to one was done in Ferguson, Missouri.