Hundreds gathered at the Garissa University in eastern Kenya today to remember the incident, one of the country's worst-ever terrorist attacks.
Four gunmen from the al-Qaida-allied Somali al-Shabab group attacked the university, vowing retribution for Kenya's military support for Somalia's weak government.
Kenya has suffered a wave of extremist attack since it deployed the troops to Somalia in October 2011.
The university re-opened in January after extensive refurbishment of the bullet-scarred structures.