A woman sobbing hysterically ran under the police tape and was quickly surrounded by officers.

Three women and a man were shot and killed, and four other people were seriously wounded, when an argument broke out inside a home in Englewood on the South Side early Tuesday, according to Chicago police.

at the scene, a two-story house with a gray stone front in the 6200 block of South Morgan Street.

The first was around 2 a.m., when Brown said the ShotSpotter system alerted police to gunfire near the Morgan address.

Brown did not say if police responded to the alert.

As officers continued working the scene into the morning, the family of one of the victims who died, Denice Mathis, approached the cordoned off section of South Morgan.

Mathis lived on the South Side, but the family didn’t know what brought her to the gathering on South Morgan.

A man who said he was Mathis’ brother said his sister had been to the house many times before.

“She was a good girl — none of these knuckleheads,” the brother said.

Earlier Tuesday, a woman sobbing hysterically ran under the police tape blocking the entrance to South Morgan at West 63rd.

The attack is the third mass shooting in Chicago in little over a week, and came just hours after gunfire erupted at a party in the Back of the Yards neighborhood on the South Side, killing a man and wounding two women wounded.

The weekend before, six men and two women were wounded when someone in a silver car opened fire in a shooting in the 8900 block of South Cottage Grove Avenue in the Burnside neighborhood.

Mayor Lori Lightfoot said Chicago is part of a “club of cities to which no one wants to belong: Cities with mass shootings.”.

“And that starts with eliminating opportunity for criminals, for children to get access to illegal guns so that petty disputes turn into mass shooting events, as we’ve seen over and over and over again—not just this year, but every year.”.

But, what matters most is the people who, right now, are the in the hospital fighting for their lives and the family members who are fearful of what was gonna happen,” she said.

Asked whether she believes Cook County State’s Attorney Kim Foxx is doing a good job prosecuting gun offenders, Lightfoot pointed to what one of the state’s attorney’s top aides said about the Chicago Police Department during a recent webinar for reporters.