Although they were not personally close, the Emperor Franz Joseph was profoundly shocked and upset. It quickly emerged that three leading members of the assassination squad had spent long periods of time in Belgrade, had only recently crossed the border from Serbia, and were carrying weapons and bombs of Serbian manufacture. They were secretly sponsored by the Black Hand, whose objectives included the liberation of all Bosnian Slavs from Austrian rule, and masterminded by the Head of Serbian Military intelligence, Apis.