Who thew the grenade at Franz Ferdinand?

The grenade thrown at Archduke Franz Ferdinand on June 28, 1914, was launched by Gavrilo Princip, a member of the nationalist group known as the Black Hand. However, it was actually another conspirator, Nedeljko Cabrinovic, who initially threw a grenade at the Archduke's motorcade. The attack ultimately failed, but later that day, Princip assassinated Ferdinand and his wife, Sophie, which triggered a series of events leading to World War I.