The Sheikh Omar Hadid Brigade, a Salafist organization affiliated with Islamic State, claimed responsibility for the late Sunday night rocket attack on Israel. Palestinian terrorists fired two rockets at Israel on Sunday night; one exploded in an open area in Eshkol, causing no injuries or damage, and the second failed to cross into Israel, though it triggered warning sirens. In recent months, the Omar Brigade – named after a key figure who helped Abu Musab al-Zarqawi set up and run al-Qaida in Iraq a decade ago – has attempted to challenge Hamas’s rule in the Strip. The ISIS linked group claimed responsibility last month for rocket fire on the Israeli cities of Sderot and Beersheba. The Omar Brigade hopes to spark a new war with Israel that will weaken Hamas and enable it to fill the resulting power vacuum.Hamas arrested members of the group following past rocket attacks, and has stepped up attempts to enforce the August 2014 truce with Israel. The IDF responded early on Monday destroying what it called Hamas terror infrastruscture in the Gaza Strip. The army released a statement saying that it held Hamas responsible for the earlier rocket attacks on Israel.