House of Reps Member, Bello Sani is Dead. Who killed Bello Sani?

www.odogwublog.com reports that a member of the House of Representatives, Bello Sani , 51,  is reportedly dead. Sani was representing Mashi/Dvisi federal constituency of Katsina state.
Speaker of the House of Representatives, Rt. Hon. Yakubu Dogara, said the late Bello was compassionate, principled, and interacted freely with all members.
Dogara said: “With great sadness, I receive the news of the death of Hon. Bello Sani, who represented Mashi/Dvisi federal constituency of Katsina state.
“Our colleague was compassionate, principled, and interacted freely with all members. Our heartfelt condolences go to his immediate family, government and people of Katsina state.
“We pray that God gives all the fortitude to bear the irreparable loss.”