Four people were injured during a drive-by shooting on the eastern side of Detroit.
The three men and a woman were outside around 10:40 pm. When the shots were fired from a passing car, the police said.
Two of the victims were included in a critical condition in a hospital. The other two are in stable condition. No arrests were made.
Detroit violence has risen and more than 500 rifles have been seized in the last four-week period, according to Police Chief James Craig.
American lawyer Matthew Schneider told reporters that the Trump administration will send federal agents to Detroit to help combat the escalation of violent crime in the city.
Schneider said that federal officers who were sent to Detroit were charged with arresting fugitives, dealing with illegal possession of weapons and breaking drug trafficking, among other tasks.
More than 40 people have been employed in the U.S. Bureau of Alcohol, Tobacco, Firearms, and Explosives, known as ATF, either recently in Detroit or assigned to that effort.