A 25-year-old man was found dead in his car in Bat Yam after being shot Sunday night.
The man was known to police, who reported that suspects had been arrested in relation to the incident.
The killing in the city just south of Tel Aviv-Jaffa was the third such incident in Israel in the last 24 hours.
Earlier Sunday evening, a woman, 30, was found dead in Dimona, with signs of trauma on her body.
Early Sunday, a woman, 22, was stabbed to death in the Arab Triangle town of Tira. Police arrested her brother on suspicion of killing the woman after disagreeing with her lifestyle.