A shooting at a nightclub in the southwestern town of Konstanz in Germany early Sunday morning killed two people, one of which was the shooter, and injured four, three of whom are in critical condition, according to CNN.

The incident was reported in a statement released via tweet by the city’s police. The shooting, which happened inside the nightclub, killed one person and injured three. "Many guests had left the building panic stricken or were hiding when the shots were fired," the statement said.

Police rushed to the scene, and entered into a shoot-out between the gunman and the police. One policeman was shot but left with non-life-threatening wounds, but the gunman was left in critical condition and later died in the hospital.

According to an anonymous police official, investigators have, as of yet, found no evidence of terrorism. "According to our investigations this is not terror-related, unless the gunman radicalized himself within the last three days," Fritz Bezikofer of the Konstanz police told CNN. Police also believe the gunman was acting alone. According to The Guardian, a witness told German media that the attacker had a machine gun. “The club was packed. I would guess there were more than 100 people inside,” the witness said.

German police identified the suspect as a 34-year-old Iraqi citizen who had been living in Konstanz “for a long time." He was not an asylum seeker. He was known to law enforcement due to “various offenses,” but no other information was provided.

This attack comes on the heels of a similarly deadly attack in Germany just this weekend. On Friday, a man who was known to police and had mental health issues attacked supermarket shoppers in the town of Hamburg with a knife, killing one and injuring six, according to The Guardian.

The nightclub shooting comes a little more than a year after the June 2016 Pulse nightclub shooting in Orlando, Florida which left 50 dead and 53 hospitalized in what has been described as the worst mass shooting in U.S. history.