According to the police website, the attack took place in the town of Wetlanda, which is located in the province of Jönköping.
The law enforcement officers who arrived at the scene used firearms against the criminal, whose age is estimated at about 20 years.
After that he was detained and taken to the hospital.
"The attack in Wetlanda is classified as an alleged terrorist crime," the report says.
Earlier it was reported that eight people were injured as a result of an attack by an unknown person with a knife in Sweden.