Ugandan police officers stand guard at a gate outside a building where five people were arrested in Kampala following a tip-off from local residents on April 7, 2015 suspecting them of alleged terrorist activity. The arrest comes just days after police said they arrested a Kenya-based man of Somali origin suspected to be a Shebab militant at the weekend after students at Ark Hostel in Wandegeya, informed police of a suspicious man taking pictures of the hostel. Security has been on high alert following attacks on a Kenyan university leaving 148 people dead. AFP PHOTO/ISAAC KASAMANI (Photo credit should read ISAAC KASAMANI/AFP/Getty Images)