MILWAUKEE -- A father fatally stabbed two people, including his 5-month-old daughter in her crib, and wounded two other people in an attack at a Milwaukee duplex Friday, the city's police chief said.
The baby's 19-year-old mother and her new boyfriend, 22, were rushed to a Milwaukee area hospital where the woman underwent surgery, according to Police Chief Edward Flynn.
An older man who was a friend of the family was also killed, police said.
The suspect was found in a bathroom at the residence with superficial stab wounds and was arrested, Flynn said.
The mother was able to call police as she was being attacked, Flynn said.
"The offender, the man we've arrested, is apparently the ex-boyfriend (of the mother) and father of the dead baby," he said. "The young man who was stabbed is someone who very recently established a relationship with the mother of the baby. Obviously the mother of the baby has been seriously wounded.
Multiple knives that may have been used in the stabbing were found on scene, reports CBS affiliate WDJT.
Flynn said the parents had a troubled relationship.
"We have learned from the people at the scene that there previous incidents of domestic violence, but none have ever been reported to us," he said.
The latest homicides are among 13 in Milwaukee since the start of the year, compared to one homicide in January 2014.
Milwaukee Mayor Tom Barrett joined Flynn at the crime scene to denounce the violence.
"As mayor, it is very frustrating to have a month like we have had in her the city of Milwaukee as it pertains to violence. Usually January is our least violent month of the year," Barrett said.
Flynn said police are not seeking any other suspects in the stabbings.