The Israeli Police said the bombing was a "terrorist attack."[7] The perpetrators were not immediately identified. The Palestinian Authority brought in for questioning two Palestinian Islamic Jihad leaders, related to Israeli claims that the organization's Al-Quds Brigades were responsible for the attack.[8][9] In September 2011, Israel arrested four Hamas militants, one of whom is an Israeli permanent resident from Jerusalem. The four are currently on trial by an Israeli military court for their role in the bombing.