Officers shoot man at U.S. border

• U.S. Customs and Border Protection says officers shot a man on the Ambassador Bridge


• The man, a Canadian citizen, approached an inspection booth waving a handgun


• He was treated for his injuries and taken into custody, a border patrol spokesman says


• CNN partner CTV reports the man had previous encounters with law enforcement

(CNN) -- U.S. officers shot a Canadian man who walked toward a border inspection booth waving a handgun early Sunday.

U.S. Customs and Border Protection said in a statement that the man stopped his car around 3 a.m. near a booth on the Ambassador Bridge, which goes between Detroit and the Canadian city of Windsor.

As he walked toward them, the officers ordered him to drop the weapon, the statement said. Then he pointed the gun in their direction, and they opened fire.

Authorities have not released the identity of the man, who they described as a Canadian citizen. He was treated for his injuries and then taken into custody, U.S. Customs and Border Protection spokesman Kris Grogan said.

Citing Windsor police, CNN partner CTV said the man has had previous encounters with Canadian law enforcement and confronted police officers minutes before the shooting on the bridge.

As he walked toward a McDonald's near the border with a firearm around 2:40 a.m., Windsor police ordered the man to drop his weapon, according to CTV.

"The suspect then turned in the direction of the officers and pointed the firearm at them," CTV said.

According to police, the man said, "Why haven't you shot me yet?" Then he got back in his vehicle and drove away.

The Department of Homeland Security's Office of the Inspector General, U.S Customs and Border Protection's Office of Internal Affairs and the Detroit Police are investigating.