RAMALLAH, West Bank — Reconciliation talks between rival Palestinian Arab factions Hamas and Fatah have been extended through tomorrow, the president of the Palestinian Authority, Mahmoud Abbas, said.

Yesterday, Mr. Abbas’s Fatah party and the Islamic Hamas movement that rules Gaza accused each other of sabotaging the talks. But Mr. Abbas told a news conference todaythat the two sides have agreed to keep the talks in the Yemeni capital San’a going at the request of President Saleh of Yemen.

“We don’t want to say the talks have failed,” Mr. Abbas said. “We hope for a positive outcome.”

The Palestinian Arab ambassador in Yemen, Ahmed al-Deek, said the two faction heads would sit together for a second time tomorrow.

Last month, Mr. Saleh proposed a seven-point plan designed to rebuild the shattered Palestinian Authority, which was riven in June when Hamas violently wrested control of Gaza from Fatah, leaving Mr. Abbas ruling only the West Bank.

On Tuesday, Palestinian Arab delegates from both factions flew into San’a for talks with Yemeni officials on ending the rift.

The heart of Mr. Saleh’s plan is restoring Mr. Abbas’ authority in Gaza. The Hamas takeover has dramatically deepened the hardship in the coastal strip, which is isolated internationally and under an Israeli and Egyptian blockade.