A gunman killed six people in a shooting spree in the northern US state of Michigan, police said Sunday, after arresting an armed 45-year-old white male for the crime.

A gunman killed six people in a shooting spree in the northern US state of Michigan, police said Sunday, after arresting an armed 45-year-old white male for the crime.

Officials corrected an earlier report of seven dead, stating that one of the victims was alive but seriously injured.

The suspect was apprehended at 12:40 am on Sunday (0540 GMT) after the shooting rampage Saturday night in the city of Kalamazoo, police said.

Michigan state trooper Lieutenant Dave Hines told a post-midnight press conference that there were three separate shootings -- one outside an apartment complex, another outside a car dealership, and the third at a chain restaurant.

The gunman's motives were unclear, officials said.

Kalamazoo, in the northern state of Michigan, is located some 190 kilometers (160 miles) west of the industrial city of Detroit and has a population of 76,000, according to census figures.

The Kalamazoo killings follow a pattern of mass shootings in the United States that include the December 2 massacre in San Bernardino, California that left 14 people dead and 22 wounded, and the December 14, 2012 Sandy Hook school massacre in which 20 children and six adults were shot dead.

Gun violence kills about 30,000 Americans every year and mass shootings -- rare in most countries -- have been on the rise in the United States.