Kenya Tuesday marked the ninth anniversary of the Garissa University terror attack.
The attack which was carried out by al-Shabab left 147 people, majority of them students, dead.
In the early hours of 2 April 2015, heavily armed attackers stormed the College and shot dead two security guards before aiming fire at students in their classrooms while they were preparing for exams.
Four years later, the court sentenced a militant Islamist to life in prison for his role while two others were jailed for 41 years each.
The three had earlier been found guilty of conspiracy to commit a terrorist attack and of belonging to al-Shabab, which is linked to al-Qaeda.
Last year two of the convicts got relief after the court quashed two counts that they were sentenced to serve 15 years, meaning they will now serve 26 years.
In their appeal, they argued that the sentence of 41 years was harsh and excessive.
The court ruled there was no evidence to prove that the two were members of al Shabab.
The attack was the second-deadliest in Kenya.
The al-Qaeda bombing of the US embassy in 1998 killed more than 200 people.