A man and his son were injured in a scuffle that broke out in the Kiryat Moshe neighborhood of Rehovot.
The man, 40, was in serious conditions and suffers from stab wounds. He was taken to Kaplan Hospital in the city.
The son, 16, was lightly injured and refused to be evacuated by ambulance from the scene.
The police was searching for the boy as well as for eyewitnesses to the incident.