They are Mr Abiodun Awoleye-Dada, who has moved to the Accord party; Mr Samuel Segun-Williams, who has moved to the Labour Party; and Mr Lawan Hassan-Anka, who has joined the Peoples Democratic Party.
The fourth member, Mr Lam Adesina, has defected to the African Democratic Congress.
The Speaker, Mr Yakubu Dogara, has just announced the defections on the floor of the House in Abuja