A man who was injured shielding Christians in the Mandera bus attack in Kenya has died.

Salah Farah, 40, died on Sunday night at the Kenyatta National Hospital after being admitted for three weeks.

Farah was until his death the deputy headmaster at Mandera County Primary School and a student at Maasai Mara University.

The father of five was part of a group of commuters who on December 21, 2015, refused to be separated from their Christian colleagues when ambushed by terrorists near Kotulo a few kilometres away from Mandera town.

They dared the suspected al Shabaab militiamen to either kill all passengers on the Mandera-bound bus or leave.

The militants left fearing retaliation by residents from nearby villages, but only after shooting at the bus as it drove away, killing two people and injuring three.

Farah, who took bullets on his arm, was taken to Mandera hospital, before being flown to Nairobi for specialized treatment at KNH on December 25. The Star Kenya.