The convoy managed to go through, however, and make their way to the inauguration of a wastewater treatment plant.
"Hamas opening an investigation is not enough", he said. The two agreed in October to begin negotiations on reunification, with Egypt serving as mediator.
He insisted "this incident won't stop us from our work in Gaza and won't stop us from the reconciliation".
Again, Abbas and several PA officials had previously made similar charges against Hamas, accusing it of conspiring with "outside powers" to establish a separate Palestinian state in the Gaza Strip.
There was no immediate claim of responsibility. The White House is hosting a gathering of worldwide representatives Tuesday to discuss economic development and the dire humanitarian situation, which White House envoy Jason Greenblatt has blamed on Hamas' control.
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The rival factions have been trying to reconcile since 2007 when Hamas seized control of Gaza from Fatah forces.
Spokesperson of the Hamas-run authority in Gaza, Fawzi Barhoum, said that Hamas strongly condemns the explosions and assassination attempt, and considers what happened as a crime targeting the Palestinian people, and an attempt to create serious tension.
On Sunday, Azzam al-Ahmad, member of the Fatah Central Committee, denied achieving any progress in implementing the reconciliation agreement, especially concerning the handing of the ministers in the Gaza Strip over to the Fatah-ruled PA.
In the West Bank, Abbas blamed Hamas for the blast.
Deputy Fatah chairman Mahmoud al Alojul said the attack was in the context of attempts to "liquidate the Palestinian cause".
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However, Apple hasn't been shy about teasing new hardware at the event too, even with its software focus. As is typical for Apple, rumors have been swirling about its upcoming operating system updates .
Hamdallah, whose portrait is featured along with Abbas's and those of Hamas leaders on Gaza posters promoting Palestinian unity, is based in the occupied West Bank.
The United Nations Mideast envoy also condemned the attack.
This morning Hamdallah was the target of an assassination attempt with a bomb planted underground inside the blocked Palestinian enclave shortly after his convoy passed through the Erez border crossing, controlled by Israel.
Meanwhile, Jared Kushner, President Trump's senior adviser and son-in-law, planned to hold a "brainstorming session" on the humanitarian crisis in Gaza.
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We still don't know whether he will be available or not. "We are a rugby team and no rugby team has an aura of invincibility about them".
This ambitious project has received funding from the World Bank, European Union, and other European governments.