The Paris prosecutor's office said on Sunday that a fifth person had died from their wounds following Tuesday's Strasbourg Christmas market shooting.
An official with the prosecutor's office said the victim was a Polish national and gave no other details.
"My brother Barto Pedro Orent-Niedzielski has just passed away. He thanks you for the love and strength you have given him," the brother of the 36-year-old victim from the Polish city of Katowice wrote on Facebook.
The gunman, Cherif Chekatt, was killed on Thursday night after firing on police, ending a two-day manhunt that involved more than 700 members of the security forces.
The 29-year-old attacked Christmas market shoppers armed with a gun and a knife on Dec. 11.
Orent-Niedzielski and his Italian friend Antonio Megalizzi had tried to stop Chekatt from entering a bar during Tuesday's assault, a close friend told AFP.
Megalizzi, 28, died from his injuries on Friday.
Nicknamed "Bartek", Orent-Niedzielski had lived in Strasbourg for 20 years, according to his friend.
11 people were also injured in the bloodbath, with several still in a critical condition.
Please click to read our informative text prepared pursuant to the Law on the Protection of Personal Data No. 6698 and to get information about the cookies used on our website in accordance with the relevant legislation.
6698 sayılı Kişisel Verilerin Korunması Kanunu uyarınca hazırlanmış aydınlatma metnimizi okumak ve sitemizde ilgili mevzuata uygun olarak kullanılan çerezlerle ilgili bilgi almak için lütfen tıklayınız.