Authorities say four people are dead and four others were critically injured after a Mother's Day at an Milwaukee apartment building fire.

A fifth person has died as a result of a fire on May 11 in the Highland Court Apartments on Milwaukee's near west side, Fire Chief Aaron Lipski said.

The Milwaukee Police Department, the Wisconsin Department of Criminal Investigations (DCI) and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) are investigating a fatal fire that occurred on Sunday.

Milwaukee's Fire Chief is sounding the alarm about the absence of fire sprinkler systems in certain buildings, following a tragic apartment fire that claimed the lives of five people over the weekend.

The building's landlord told the Journal Sentinel May 12 that she was staying at her apartment the night of the fire, when chaos ensued.

The Milwaukee County Medical Examiner's Office confirmed five deaths following the fire near 27th Street and Highland Boulevard on Mother's Day. Four of the victims were identified Monday afternoon as:

Authorities are responding to a large apartment fire near 27th and Highland Sunday morning, May 11. CBS 58 has a crew at the scene working to gather details. Stick with CBS 58 on-air

The Milwaukee Fire Department marks 150 years of service, sharing historical anecdotes on social media from their past engagements and the evolution of their duties.