The 23-year-old midfielder spent three years with the Swiss club, making over 90 league appearances and winning three consecutive Super League titles.
He featured 28 times in all competitions in the first half of this season, scoring six goals.Elneny began his senior career with El Mokawloon in the Egyptian Premier League.
An experienced Egypt international, he helped his country to the quarter-finals of the London Olympics in 2012.
The transfer is subject to the completion of regulatory processes.
Everyone at Arsenal would like to welcome Mohamed to the club.
Credit: Arsenal.Com
Download the Howwe Music App
