A Samajwadi Party leader's son was shot dead during a violent clash that broke out here after a "road rage" incident involving them and a local BJP politician's son, police said. They said 20-year-old Sachin, son of a district-level SP-leader Puranmal Prajapati, was killed Monday night in Palasahibabad-locality in Sasni-Gate-area as the argument following the collision between two motorcycles led to stone-pelting and firing.