The death toll in the Trebes incident currently stands at four people, including the perpetrator, reportedly a man of Morocco origin who took hostages in the town's supermarket on March 23.
French Interior Minister Gerard Gerard Collomb named the gunman, who was killed by police, as 26-year-old Redouane Lakdim, describing him as a small-time drug dealer.
"He was known by the police for petty crimes, we had monitored him and did not think he had been radicalized. He was already under surveillance when he suddenly decided to act," Collomb said.
The attack is treated as a terror incident, as prosecutors claimed Lakdim had pledged allegiance to Daesh*.
French president Emmanuel Macron has addressed the attack on his Twitter channel. He was joined by the UK Prime Minister Theresa May.
Conversations sprung out on Facebook as well, touching on France's gun and immigration laws.
Some users on Instagram simply paid respects to the victims of the attack in Trebes.
*Daesh (also known as ISIS/ISIL/IS) is a terrorist group banned in Russia