KALAMAZOO, Mich. (AP) — Authorities say a man and woman have died in a murder-suicide and their 4-year-old child is in critical condition.

Kalamazoo Department of Public Safety Assistant Chief Vernon Coakley said the shootings Thursday morning killed Julina G. Gibson and Nicholas A. Mitchell. He said during a news conference that the couple was estranged.

Gibson's mother, Linda Newkirk, told WOOD-TV the shooting occurred while Mitchell was dropping off the child after an overnight visit. She said her daughter and Mitchell had been arguing about visitation of the boy.