Senior Hamas leader Ismail Haniyeh (Photo: Reuters)
Ismail Haniyeh's office says the injury happened Thursday when he took part in a training session of veteran football players in Gaza City. He has been ordered to rest for at least 10 days.
Haniyeh, 48, is an avid football player who joins the veteran team each week.
In his youth, Haniyeh played professionally for two Gaza teams and also served as chairman of the board of directors for the professional Islamic Society team.