Three men were shot dead on Friday night in three separate incidents in Kafr Qara, Nahf and Kiryat Ata.
A 37-year-old man was shot dead in a violent incident on Friday evening in the predominantly Arab town of Kafr Qara southeast of Haifa.
MDA paramedics who arrived on the scene immediately confirmed his death.
Police have launched an investigation into the attack and, as of Friday, are conducting searches for the perpetrators.
Another incident in the village of Nahf saw a 25-year-old man shot dead approximately an hour later, according to Hebrew media. MDA staff performed resuscitation operations on him at the scene but was eventually forced to confirm his death as well, with police opening a separate investigation into his death.
Police set up checkpoints in the area to locate suspects. A burned vehicle was also found near the scene.
Another murder around the same time involved a 42-year-old man who had been shot in the city of Kiryat Ata. MDA officials evacuated him to the Rambam Healthcare Campus in Haifa in critical condition but he later died of his wounds.
This attack followed the fourth and fifth murders on Friday alone in Israel, according to Hebrew media, occurring shortly after a murder in Ashkelon a few hours earlier and then another two people dead in Kiryat Tivon.
Wave of violence
This is also the ninth murder in Arab society since the beginning of June, making it the most murderous month this year, exceeding February in which eight were murdered in Arab cities, according to Walla.
Violence has been a continuing issue in Israel. Also on Friday, approximately 600 people gathered in Davidka Square in Jerusalem for the annual SlutWalk - which is an event that protests violence against women and rape culture.