17-year-old Jamil Hasanov was injured in a stabbing dispute between 17 and 18-year-olds in the Sabail district of Baku.
Police Major Elshad Hajiyev, head of the press service of the Interior Ministry, told Tehsil.biz that Hasanov's blood was donated by police at the hospital and his life was saved.
A criminal case has been launched and an investigation is under way.
Nihad Farhadov, born in 2004, suspected of injuring Hasanov, was detained as a suspect and is under investigation.