There has been another day of escalating violence in Gaza, as tension continues to grow between rival security factions.One man was killed in an attack apparently targeting the Palestinian Intelligence chief, Tareq Abu Rajab. Rajab, who is an ally of President Mahmoud Abbas, was in an elevator at his Gaza headquarters when it exploded. Several others were wounded in the blast. Rajab was taken to an Israeli hospital for treatment, at the request of the President, who claimed the attack was an assassination attempt. One Palestinian intelligence official has pointed the finger at the Hamas-led government, which deployed a new security force on Wednesday. Hamas was also blamed for an attempt on Rajab’s life in 2004, when he was shot by unidentified gunmen, sustaining severe wounds. The organisation later denied responsibility for the attack.