Palestinian Authority President Mahmoud Abbas condemns the attack . Israeli Police : 8 wounded , including an Israeli police officer in critical condition . 2 Palestinian cousins attacked a Jerusalem synagogue with grenades and a gun . CNN 's Chelsea J. Carter , Michael Schwartz , Kareem Khadder , Jethro Mullen , Rachel Kitchen , Shimon Prokupecz , Jason Hanna and Khushbu Shah contributed to this report . Hamas blames Palestinian Authority , others for spreading ` ` libels '' against Israel .
Palestinian Authority President Mahmoud Abbas condemns the attack . Israeli Police : 8 wounded , including an Israeli police officer in critical condition . 2 Palestinian cousins attacked a Jerusalem synagogue with grenades and a gun . Hamas blames Palestinian Authority , others for spreading ` ` libels '' against Israel .