DETROIT -- Police have located the mother of a toddler found dead Wednesday afternoon in a Detroit apartment.

She was in a psychiatric hospital.

The decomposing body of the boy, described by police as 2 or 3 years old, was discovered by a maintenance worker in a unit at the Madison Estates apartment complex on Trumbull Avenue in Detroit's Woodbridge neighborhood about 3 p.m. Wednesday.

"The mother was located at a psychiatric ward early this morning," Detroit Police Officer Nicole Kirkwood said Thursday morning.

She said no further details were available and did not release how long the mother is believed to have been in the hospital.

"The apartment maintenance person noticed a foul odor coming from the apartment," Kirkwood said. "He opened the door and found the deceased lying in bed."

Detroit Police Capt. Darin Szilagy of the 3rd Precinct on Wednesday said paramedics were dispatched to the same address earlier this month.

At the time, it's believed the child's mother was having a medical issue and was found "out front on the grass."

Szilagy didn't know if she was conscious and coherent at that time.

"She was transported to Detroit Receiving Hospital and subsequently in the next day transferred out to University of Michigan Hospital," he said. "It's going to take us time to figure out why she was transported."

It's not clear if another guardian was tending to the child when the mother was hospitalized in May.

Following the discovery of the body, Detroit police said they were searching for the mother and father.

Szilagy said the father is not a criminal suspect, but police wanted to locate him for a "well-being check."

Police had no information that he'd been contacted as of Thursday morning. The child's autopsy is pending, and a cause and manner of death hasn't been released.

"It's a suspicious death right now," Szilagy said Wednesday. "Our detectives are working and treat every suspicious death as if it could be a murder."