Kenya is holding three days of mourning for those who died in Thursday’s attack on students by al-Shabaab militants.<br /><br /> So far only 54 of the 148 victims have been identified by their distraught relatives.<br /><br /> Almost all those killed at Garissa University were students, another 79 were injured.<br /><br /> a prayer for the victims #KenyaAttack #Kenya pic.twitter.com/sAgkAHCIyp— Anto ʘ‿ʘ (@BresciaAnto) April 5, 2015<br /> <br /><br /> A massive investigation is under way to try to find the suspected mastermind behind the attack. The authorities are offering a reward for the capture of Mohamed Mohamud. <br /><br /> It has also emerged that one of the four gunmen<br />who raided the university seeking out non Muslims to kill has been identified as the son of a government official. He has been named as Abdirahim Abdullah, an ethnic Somali with Kenyan nationality. <br /><br /> Police have now stepped up security not only in Garissa but in several major cities at shopping malls, and other public buildings. <br /><br /> Churches in particular have been