The tweet, which is written in French said that Diesel, the 7-year-old malinois, was killed by what police described as terrorists.
The dog was an assault and explosive search dog and, according to police, the dogs are "indispensable in the missions and operations of #RAID."
RAID stands for Research, Assistance, Intervention and Deterrence unit, The Guardian reported.
Five police officers were hurt during the sweep to capture alleged mastermind Abdelhamid Abaaoud, The Independent reported.
Seven explosions and gunfire were heard as the raid pushed through the morning. Two suspects were killed and up to seven arrests were made, The Independent reported.
The world has gone to social media to honor Diesel.