Al-Shabaab on 2 April 2015 carried out a massacre killing 147 people in the Garissa University College situated in Garissa County in northeastern Kenya.
In all, 151 people were killed including 142 students, three security officers, two university security personnel and four militants who were killed by the security forces. The attack left 104 people injured, including 19 who are in critical condition.
The college campus is situated 145 km away from the porous Somalia-Kenya border.
Al-Shabaab is a Somalia-based militant organization and an al Qaeda affiliate.
The group has been blamed for a series of attacks in Kenya, including the siege at the Westgate Mall in Nairobi in 2013 in which 67 people were killed.
The group has vowed to retaliate against Kenya for sending troops to Somalia under Operation Linda Nchi in 2011 to fight the Al-Shabaab militants who had kidnapped foreigners and aid workers inside Kenya.
According to an estimate by the Kenyan Government 312 people have been killed in Al-Shabaab attacks in Kenya from 2012 to 2014.
The terror attack is the second-worst in the country's history next to the bombings carried out by Al-Qaeda on the US Embassy in Nairobi in which 213 people were killed.
When: 2 April 2015