On 31 August 2016, a person believed to be carrying the day's earnings from cannabis sales suddenly pulled a gun during a routine arrest and shot two police officers and a civilian.[24][25] The injuries of one of the officers who was shot in the head were life-threatening (he survived, but needed a long period of rehabilitation), while the injuries of the other victims were less serious.[25][26] Police sealed off the entire neighborhood and located the perpetrator in Kastrup a few hours later. During a brief shootout with Politiets Aktionsstyrke (a special intervention police unit) he was seriously wounded and later died from his injuries in the hospital.[27][28][29] The perpetrator, a 25-year-old Danish citizen of Bosnian descent (he arrived in Denmark as a child with his family), was well-known to the police for violence and involvement in cannabis sale. Although known to be a sympathizer of Islamic extremism, this is not considered to have played a role in his actions.[24][30][31] Police officers very rarely receive life-threatening injuries during encounters with criminals (before the Christiania shooting, the last police officer to be killed by a criminal in Denmark was in 1995[32]) and the incident was widely condemned.[33]