Yes. The Black Hand.
June, 1914
Time = 10:10 am.
“Dimitrijevic sent three members of the Black Hand group based in Belgrade, Gavrilo Princip, Nedjelko Cabrinovic and Trifko Grabez, to Sarajevo to carry out the deed.
Unknown to Dragutin Dimitrijevic, Major Voja Tankosic, a senior member of the Black Hand group, informed Nikola Pasic, the prime minister of Serbia, about the plot. Although Pasic supported the main objectives of the Black Hand group, he did not want the assassination to take place, as he feared it would lead to a war with Austro-Hungary. He therefore gave instructions for Gavrilo Princip, Nedjelko Cabrinovic and Trifko Grabez to be arrested when they attempted to leave the country. However, his orders were not implemented and the three man arrived in Bosnia-Herzegovina where they joined forces with fellow conspirators, Muhamed Mehmedbasic, Danilo Ilic, Vaso Cubrilovic, Cvijetko Popovic, Misko Jovanovic and Veljko Cubrilovic.”
http://www.spartacus.schoolnet.co.uk/FWWarchduke.htm
There was a different Black Hand group in the US, but it was, IIRC, cosa nostra. http://tonij16102.multiply.com/journal/item/662
It’s funny. Neither my high school history courses nor the few I took in college EVER mentioned that the Black Hand was a Muslim group. I had to research that on my own.
Thank you for this information, CB. I’m absorbing it as you read this.