cairo/ramallah hamas agree dissolve administration run gaza say sunday major step towards hand control enclave palestinian unity government decade bitter rivalry president mahmoud abbas islamist group rule gaza since brief palestinian civil war 2007 say take courageous serious patriotic decision dissolve administrative committee run territory million people hand power form unity government reunification decade hamas abbas secular fatah movement battle control gaza may hinge whether complex issue relate power-sharing stymie reconciliation bid past resolve abbas welcome hamas move result talk mediate egypt say would convene palestinian leadership discussions upon return new york attend u.n. general assembly development would enable formation national reconciliation government work gaza strip hold ... elections say statement official news agency wafa early palestinian government spokesman say cairo mediation present historic opportunity could help palestinians toward full statehood fatah say still need clarification hamas hand government ministries gaza control enclave border cross israel egypt hamas fatah agree 2014 form national reconciliation administration could agree detail unity government form hamas last palestinian general election 2006 short-lived aim pressure hamas relinquish control gaza abbas cut payments israel electricity supply enclave lead power provide less four hours days never six hours day azzam al-ahmad head fatah delegation talk cairo tell wafa step enhance unity palestinians end ugly division two party meet talk take form shuttle-diplomacy egyptian officials mediate ahmad say two side plan meet face-to-face give date palestinian factions would join talk late discuss practical step implement agreement add mend fence western-backed abbas would another step hamas diplomatic push improve relations neighbor egypt keep frontier gaza largely close accuse group past aid islamist militants egypt sinai desert something hamas deny unite nations envoy welcome sunday news party must seize opportunity restore unity open new page palestinian people u.n. special coordinator middle east peace process nickolay mladenov say statement add u.n. ready assist talk order alleviate hardship gaza mladenov thank egypt tireless efforts create positive momentum opinion poll show parliamentary elections hold hamas would win gaza israeli-occupied west bank seat abbas palestinian authority abbas 82 12 years mean four-year term president opinion poll show unpopular clear successor new presidential election appear imminent hamas say ready hand gaza palestinian unity government