The sources said Palestinian National Security Adviser Jibril Rajoub will travel to Damascus soon to meet with representatives of Palestinian factions based in Syria.
The sources said Rajoub wants to discuss the halt of attacks on Israelis agreed to by the factions' leadership in Gaza as well as the agenda of the upcoming inter-Palestinian dialogue in Cairo.
The announcement of Rajoub's visit to Syria comes a day after Israel said it had "unequivocal" evidence the order for last Friday's suicide bombing in Tel Aviv came from the Islamic Jihad headquarters in Syria.
Palestinian President Mahmoud Abbas had said the attack was ordered by a "third party," without elaborating.
Islamic Jihad claimed responsibility for the suicide bombing attack that killed five Israelis.