KALAMAZOO, MI -- Kalamazoo's police chief is calling Saturday night's mass shootings in the area "random acts of violence."

Seven people were killed Saturday evening and Sunday morning when a man in his mid-40s from Kalamazoo shot people at random at three different scenes.

"It's totally unprovoked, random acts of violence," said Kalamazoo Department of Public Safety Chief Jeff Hadley. "We're still trying to figure out the motives."

Police arrested the man in a Chevrolet HHR in downtown Kalamazoo at 12:40 a.m., more than six hours after the first shooting occurred.

Hadley said after the arrest, police did wonder if there were perhaps other victims since the acts were so random, but at this point they are unaware of any other people who were shot during the murder spree.

The first shooting occurred at Meadows Townhomes, 5066 Meadows Blvd., in Richland Township, around 6 p.m. There, a woman was shot in the parking lot. She remains in serious condition at Borgess Medical Center.

A second shooting occurred at Seelye Ford, 4102 Stadium Drive in Kalamazoo, shortly before 10:30 p.m., where two men, believed to be a father and son who were looking at a vehicle, were shot and killed in the parking lot.

Around 10:30 p.m., four people were shot and killed in vehicles in the parking lot of Cracker Barrel, 5581 Cracker Barrel Blvd., off of 9th Street in Texas Township west of the city. A fifth person shot at that scene later died of her injuries. She was 14.

Hadley announced early Sunday morning he would hold a press conference at the Kalamazoo Department of Public Safety headquarters at 7 a.m.

In the press release announcing the news conference, Hadley said the suspect is in custody and "there is no danger or threat to the community."

Emily Monacelli is a reporter for MLive.com. Contact her at emonacel@mlive.com or follow her on Twitter