The Bharatiya Janata Party on Monday suspended B Y Raghavendra, son of B S Yeddyurappa, from the party.
The action comes in the wake of alleged anti-party activities by him.
Raghavendra remained a BJP MP even after his father quit the BJP. He was always seen alongside his father at functions organised by the Karnataka Janata Party.
The party has also suspended Shivakumar, son of C M Udasi, who is also a Yeddyurappa loyalist. The suspension of both leaders comes four weeks before the Karnataka Assembly elections.