MILWAUKEE - It's a horrible start to the work week: one woman is dead and three other people were injured when fire tore through their duplex early Monday. About 2 a.m. firefighters got word of people trapped in the burning home in the 2500 block of North 37th Street. The woman who died lived in the upper unit of the duplex and apparently wasn't able to get out in time. Four other people got out of the lower unit. Three of them- a man and two women - suffered non-life threatening injuries. They were lucky because the blaze was very intense. Fire department spokesperson Christopher Snyder said due to the intense flames crews were unable to go inside immediately. "(They) knocked it down from the outside. Entered immediately with the full awareness that we had people inside. And within 30 seconds (they) found the victim in the front room and again unfortunately it was too late," Snyder said. Snyder said there were no working smoke detectors in the duplex. Investigators said they could have save the woman's life.