A 28-year-old woman, a four-year-old girl and a three-year-old boy were injured when a bomb exploded in the front of the car the woman was driving.
A 30-year-old man was killed close to Or Yehuda after an explosive device set off in his car.
The police were conducting operations focusing on criminal possession of illegal weapons by criminals and others.
They said the wounded were rushed to hospital.
Two cow bombs exploded in the village of Al Islah in the Diyala Governorate in Iraq, wounding a civilian.
EU Ambassador to Israel Emanuele Giaufret also spoke out on Twitter.
Idlib province, of which Idlib is the main city, is in northwest Syria and forms part of the last big rebel stronghold in Syria.
Rina Shnerb was buried Friday afternoon. Her father and brother remain in hospital, her brother Dvir on life support.
The explosions, if seen as merely a public safety issue, can encourage the government to secure the bases and munitions used by the PMF.
The dead was identified as 38-year-old Shai Gabay from Givat Olga in northern Israel.