The Gunners announced on their website their disappointment in the former France global after he refused to take part in the club's pre-season tour, leading the press across the Channel to make a few phone calls.
Koscielny reportedly wanted a 12-month extension on his current deal that would keep him in north London until 2021.
"We hope to resolve this matter and will not be providing any future comment at his time".
This could leave Arsenal with just Sokratis and Mavropanos as the only fit centre backs at the club.
Koscielny's decision to not turn up for preseason will surely see him stripped of the captaincy, but it also gives Unai Emery an unwanted headache. A £27 million (€34m) deal has been agreed for Saint-Etienne defenderWilliam Saliba, but he will spend the coming season back in France on loan with his former club.
It it the summer of player rebellions and Arsenal is the latest team to experience it as Laurent Koscielny wants out of Arsenal and is holding out in an effort to force a move.
However, in recent years injuries have hit him hard and although nobody really points the finger towards him with regards to Arsenal's recent defensive frailties, Koscielny has been to blame with some major errors.
The Gunners are working to a tight budget this summer and are understandably keen not to commit much of it to a player who will not be part of Emery's squad for the coming season. Then again, you can not let one player dictate your transfer dealings as they sets a poor precedent.
Arsenalalso released a statement about the situation.
Kelly arrested in Chicago on federal sex crime charges
Kelly was arrested in Chicago on federal sex crime charges, NBC News said, citing unidentified law enforcement officials. Inside the court room, prosecutors handed over a DVD allegedly showing Kelly having sex with an underage female.
Pokemon Sword and Shield trailer shows off new characters
With the reveal of Gigantamaxing , we got a look at the first version-exclusive Pokemon coming to Pokemon Sword and Shield . Unlike Dynamaxing, Gigantamaxing can only be used with certain Pokemon , specifically those caught in raid battles.