rafah gaza strip hamas call palestinian president mahmoud abbas tuesday respond disband shadow government gaza strip end sanction impoverish enclave follow egyptian-mediated reconciliation talk abbas western-backed fatah faction islamist hamas say sunday would dissolve gaza administrative committee enable president administration retake control announcement promise relief gazans decade hamas rule endure poverty three war israel cairo cold shoulder yet implementation may hinge power-sharing negotiations stymie previous unity bid take practical step grind administrative committee long function gaza ready start welcome government national consensus hamas official ismail haniyeh tell reporters speak cross gaza egypt haniyeh say speak abbas phone tell people expect suspend cancel measure begin dialogue aim pressure hamas relinquish control gaza abbas june cut payments israel electricity supply enclave lead power provide less four hours days never six hours day abbas also slash 30 percent salaries 60,000 gazans employ palestinian authority abbas u.n. general assembly sunday welcome hamas overture say would convene palestinian leadership discussion return blacklist terrorist group israel west hamas 2006 legislative elections uneasy alliance fatah seize control gaza brief civil war follow year rival factions agree 2014 form national unity government could agree detail mend fence 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 say visit cairo lay strategic foundations tie egypt hamas haniyeh say hamas ask abbas lift gaza sanction disband shadow government