Hamas Prime Minister Ismail Haniyeh phoned Palestinian Authority President Mahmoud Abbas over the weekend to congratulate him on the 48th anniversary of the launching of the first Fatah armed attack on Israel.
The phone call came shortly after thousands of Palestinians celebrated the event in Gaza City on Friday.
Fatah leaders claimed that more than one million Palestinians participated in the rally. while Hamas representatives put the figure at 100,000 - 150,000.
Hamas officials scoffed at claims that over million Palestinians had participated in the rally, noting that the square could contain less that 200,000 people.