STAMFORD — The death of an elderly woman found unresponsive at the bottom of a staircase on Wednesday has been ruled a homicide, police said Thursday.

Police identified the woman as Isabella Mehner.

It was one of two homicides reported in the city Wednesday. In the other, a man was shot and killed on Montauk Drive in the Southwood Square apartment complex. The two killings appeared unrelated. There also was a shooting in the South End in which an 18-year-old was wounded, police said. That, too, appeared unrelated.

Officers responded to a Cove Road home for a report of a woman who appeared to have fallen down stairs and was unresponsive. The officers found Mehner dead at the bottom of a staircase leading to the basement of her home.

The medical examiner laater determined that the injuries Mehner sustained were not consistent with such a fall. The death was ruled a homicide and police are now investigating it as such.

“The victim lived alone at her single-family residence,” police said.

Family members of Mehner grew worried when they couldn’t reach her by phone throughout the afternoon and went by her Cove Road home to check on her. When they got there, they found her at the bottom of the basement stairs, police said.

Stamford police are asking for the community’s help to solve the case.

“If anyone saw or heard anything suspicious in the area of Cove Road at Willowbrook Avenue,” on Wednesday between 12 p.m. and 8 p.m., police ask them to call the Stamford Police Bureau of Criminal Investigations at 203-977-4420.

Police said residents in the area will notice an increased uniform police presence in the neighborhood as they investigate.

The news of the woman’s death being ruled a homicide came just hours after police announced the fatal shooting of 39-year-old Torrick Johnson on Montauk Drive late Wednesday night. Police said investigators have identified a person of interest in this case.

Johnson marked the city’s fourth homicide of 2019, while Mehner became the city’s fifth homicide victim this year.

In 2018, Stamford saw three homicides.