KAMPALA, Uganda—An explosion at an eatery in Uganda’s capital was an apparent terrorist act, President Yoweri Museveni said on Sunday. Museveni said three people entered the eatery in a suburb of Kampala on Saturday evening and left a plastic bag whose contents later exploded. He provided no more details in a series of Twitter posts but vowed to “get the perpetrators.” Police said in a statement that at least one person had died and seven others were injured in the blast. The eatery is a normally busy place, frequented by commuters. Police, who have sealed off the scene, said a bomb squad is investigating the explosion, which for many revived painful memories of a deadly bombing in 2010 that killed over 70 people in Kampala. That attack was carried out by members of the Somali terrorist group al-Shabaab, which said it was retaliating against Uganda’s deployment of peacekeeping troops to …