Four people were stabbed in an apparent scuffle in Kiryat Gat Saturday morning.
Magen David Adom paramedics evacuated the casualties - three of whom were seriously injured and one lightly - to Ashkelon's Barzilai Hospital.
Police were alerted to the scene, and opened an investigation into the incident.
An initial probe suggested that a fight between three young men in their twenties had broken out next to Kiryat Gat's central bus station. A man in his forties who passed by and tried to break up the scuffle was apparently the fourth person injured.