"Mohammed Dahlan, a top Fatah official who was seen weeping during the funeral, said the Hamas-led Interior Ministry, in charge of security, knows the identities of the assailants in the previous attacks, but has not acted against them.
He demanded that the government expose the murderers and bring them to justice, "or else we will take measures which this government has yet to witness." Dahlan hinted that the Fatah movement may respond to the murder in a similar way and hit Hamas officials.
Hamas denied involvement, denounced the shooting and promised a speedy investigation.
The attack came at a time of growing tensions between Hamas and the Fatah movement of moderate Palestinian President Mahmoud Abbas. The president threatened to call early elections following the collapse of talks on a Hamas-Fatah coalition, drawing angry accusations from Hamas that he was plotting a coup.
Fatah legislators demanded Monday that Abbas dismiss the Hamas-led government. Amid wall-to-wall condemnation of the shooting, the top Muslim cleric in Gaza called for the death penalty for the assailants.
Palestinian Prime Minister Ismail Haniyeh of Hamas rushed to condemn the attack.
"One cannot remain silent in light of the horrible crime. I have instructed the interior minister to exert all efforts needed in order to capture the murderers and put them on trial."
You have to remember that Abbas has insisted on controlling all the branches of security services. However, he now wants Hamas to find the killers and holds it responsible for lack of security. That takes nerve!