A US drone strike also killed Iranian commander Qassem Soleimani and Abu Mahdi al-Muhandis, the PMF head, last week.
Israel launched the attack on areas considered Iranian interests Friday morning.
“Unidentified aircraft targeted vehicles and arms depots in the Albu Kamal area, causing a large explosion.
“At least eight Iraqi Hashed fighters were killed,” said Rami Abdel Rahman, the head of the Syrian Observatory for Human Rights.
He said several others were wounded.
The Britain-based organization said three villages in the Albu Kamal area known for housing forces loyal to Tehran have been targeted by drone strikes since Wednesday.
DeirEzzor24 reported that weapons shipment to Lebanese terror group Hezbollah was targeted in the attack.
The weapons reportedly included ballistic missiles belonging to the Imam Ali Brigade, a Shiite militia under the PMF