Ozil, who is out of contract at the end of the season, has been heavily linked with a move to the Turkish giants.
But Arteta said no deal was done yet for the playmaker, who last played for Arsenal in March.
"Well, I don't know how close he's been before," he told a news conference after Thursday's 0-0 draw with Crystal Palace.
"There are some conversations going on with [technical director] Edu and the club at the moment, but nothing concrete yet."