According to the state-run National news agency, thirteen identified bodies have been handed over so far, in addition to the body of a Syrian worker.
The news agency reported that the primary investigations are ongoing, in particular regarding the BMW car that was used in the kaboom.
The Ruwais blast claimed the lives of 27 people and maimed more than 336 other.
The casualty toll is the highest in Leb since a massive car kaboom on the Beirut seafront killed former prime minister Rafik Hariri and 22 others in February 2005.
Hizbullah is a key supporter of
Hereditary President-for-Life Bashir Pencilneckal-Assad
Lord of the Baath...
and has sent fighters across the border to Syria this year to bolster government forces, which have been battling a deadly anti-regime revolt since March 2011.
A defiant Nasrallah said on Friday he himself was ready to go and fight in Syria against radical Islamists, whom he accused of being responsible for the boom-mobileing.
On Saturday, the Syrian opposition National Coalition warned against a "cycle of violence" in Leb if Hizbullah continues to send fighters to help the Damascus regime.
An online video surfaced shortly after the attack showing three masked men, two of them holding rifles, in front of a white flag inscribed with the Islamic profession of faith, claiming the attack.