A day after Israeli Prime Minister Ariel Sharon and Palestinian leader Mahmoud Abbas agreed to a ceasefire the Palestinian groups Hamas and Islamic Jihad said they are not bound by the agreement. Hamas said it should have been consulted before any announcement. Meanwhile Egypt and Jordan have agreed to resume diplomatic ties with Israel and send ambassadors there for the first time in four years. Tuesday’s Israeli-Palestinian summit was hosted by Egyptian President Husni Mubarak and attended by King AbdAllah of Jordan.