ST.PAUL, Minn. (WCCO) – Authorities have arrested a suspect in connection with the Blue Earth home invasion that left one dead and three seriously injured Monday.

According to the Bureau of Criminal Apprehension, the home invasion was reported to police at 12:30 a.m. on the 400 block of 4th Street East. A masked man entered the home and attacked residents inside.

Police say they still aren’t sure if this was a random attack or if anyone inside the home knew the suspect. However, police said they are not seeking additional suspects at this time.

A 37-year-old man was killed in the attack, and three women — 38-year-old Candice Marie Freeman, of Ceylon, her 19-year-old daughter, Brittany Kay Devary, and Freeman’s 15-year-old daughter — were seriously injured. The three women were taken to St. Mary’s Hospital in Rochester.

The body of the man killed has been sent to the Ramsey County Medical Examiner for an autopsy that will be performed Tuesday. Officials say they need to confirm the identity of the man and determine a cause and manner of death.

There was also a 6-year-old girl in the residence, but she was left unharmed.

It was not immediately clear how the suspect killed the man. However, Public Information Officer Jill Oliveira said the occupants were attacked, not shot, with an unknown object.

Oliveira said they still don’t have information about the suspect but warns the public to remain vigilant.

The Blue Earth Police Department and the Faribault County Sheriff’s Office are also investigating the incident.

Authorities expect to release more information Tuesday.