"The club would like to offer its sincere condolences to the family of the player.
Benitez had recently joined the club from Club America for three seasons.
The player participated for the first time with the team during yesterday's match against Qatar Sports Club in the Sheikh Jassem Cup without complaining of any health problems.
His sudden departure is a big shock for each member of the technical and administrative staff.
He was a player that over the short period he was here was regarded for his high moral character."
More top news
Footage released shows the moment the two carriages collided in what’s been described as ‘the equivalent of a family car crashing at 90mph’
Rashid Abdilah Jama, aged 39, was sentenced today to 13 and a half years at Birmingham Crown Court for raping a woman in Alum Rock in 2005.
Seven Trent Water have apologised for the disruption and are working to get the problem fixed and the road fully reopened.