CAIRO / ISTANBUL Qatar said Tuesday that mediators are working to advance to the second phase of the Gaza ceasefire agreement between Israel and Hamas. “Mediation efforts are ongoing to ensure that the current ceasefire does not collapse amid (Israeli) violations of the agreement that are causing concern,” Foreign Ministry spokesman Majed al-Ansari told a press conference in Doha. “Every violation of the ceasefire in Gaza represents a threat to the deal and weakens its impact,” he warned. “The