A two-year plot to rob two bank vehicles and kill their drivers ended last month on Interstate 95 in Martin County, authorities announced Thursday.
Authorities say three suspects were arrested just before they were to carry out their alleged plot.
Daryl Canady, Alger Ellison and Martiavius Williams, all of Palm Beach County, were taken into custody on Feb. 20 after authorities swarmed them in the southbound lanes of I-95.
According to a federal affidavit, the group planned to rob an armored truck that was picking up a large sum of money from a PNC Bank branch on Gatlin Boulevard in Port St. Lucie.
Authorities said the suspects mapped out a plan to steal millions of dollars before fatally shooting the two armored-truck guards.
Investigators said the suspects then planned to rob another armored truck, again plotting to kill the guards.
All three suspects were taken back to Palm Beach County, where they remain in federal custody.