Hamas re-elected Khaled Meshaal on Tuesday as the Palestinian Islamist group's leader after a marathon vote, a Hamas official said.
The exiled leader of Hamas said on Wednesday that Israel had failed in its "adventure" when it launched attacks on Gaza and and accepted truce terms.
A Hamas official said Egyptian mediators had clinched a truce with Israel on Tuesday that would go into effect within hours, but Egypt and Israel said a Gaza ceasefire deal was still up in the air after a week of fighting.
Israel bombed dozens of targets in the Gaza Strip on Monday and said that while it was prepared to step up its offensive by sending in troops, it preferred a diplomatic solution that would end Palestinian rocket fire.
At a conference that drew a roll-call of the Islamist leaders who have gained influence in the wake of Arab Spring revolts, Hamas leader Khaled Meshaal won a noisy welcome and pledges of support on Thursday.
Hamas's Gaza-based leadership challenged on Wednesday a Palestinian reconciliation deal signed by the Islamist group's political chief in exile and President Mahmoud Abbas of the rival Fatah movement.
Is Hamas trying to change its stripes? Terrorist attacks against Israelis appear to be on pause, and rocket fire from Gaza is down significantly.
Palestinian unity will spur mass popular protests against Israel, Hamas leader Khaled Meshaal said.