Clashes broke out in the Jabal Mukaber neighborhood of East Jerusalem on Tuesday as Israeli security forces moved into the area to make arrests. Two Palestinians armed with a meat cleaver and a gun killed four people in a Jerusalem synagogue before being shot dead by police, the deadliest such incident in six years in the holy city amid a surge in religious conflict. Palestinian media named the attackers as Ghassan and Udai Abu Jamal, cousins from Jabal Mukaber, and said they were members of a small militant group. Israeli police spokeswoman confirmed the arrest of nine Palestinians from Jabal Mukaber, some of whom are related to the attackers.