When Princip, Grabež, and Čabrinović reached Loznica on 29 May, Captain Prvanović summoned three of his revenue sergeants to discuss the best way to cross the border undetected. While waiting for the sergeants to arrive, Princip and Grabež had a falling out with Čabrinović over Čabrinović's repeated violations of operational security. Čabrinović handed over the weapons he was carrying to Princip and Grabež. Princip told Čabrinović to go alone to Zvornik, make an official crossing there using Grabež's ID card and then go on to Tuzla and link back up.